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Ductus deferens epithelium

Ductus Deferens (Vas Deferens) Male Reproductive Syste

Ductus Deferens - Yale Universit

Ductus Deferens. Inflammation; Mineralization; Epididymis. Amyloid; Duct - Atrophy; Duct - Dilation; Duct - Exfoliated Germ Cell; Epithelium - Apoptosis; Epithelium - Degeneration; Epithelium - Karyomegaly; Epithelium - Vacuolation; Hypospermia; Inflammation; Spermatocele; Sperm Granuloma; Sperm Stasis; Penis. Fibrosis; Epithelium - Hyperplasia; Inflammation; Prepuce - Inflammatio The ductus epidymis is a storage reservoir for spermatozoa that become matured here, and competent to fertilise ova. Fluid is absorbed here, and the epithlium is also secretory. The epithelium is pseudostratified, with long immotile 'sterocilia' which are in fact very long microvilli

The epithelium of the ductal portion of vas deferens consists of principal cells (with features reflecting roles in endocytosis and phagocytosis of dead sperm), dark cells (which are absent in the epithelium of the ductal portion of vas deferens of snakes), and basal cells The vas deferens (or ductus deferens) is a 45-cm (18-in) long tube that ascends on the posterior border of each testis, penetrates the body wall through the inguinal canal, and enters the pelvic cavity. Once inside, each vas deferens loops over the urinary bladder and extends down toward the region of the urethra (Figures 4.1 and 4.8) The efferent ducts (or efferent ductules or ductuli efferentes or ductus efferentes or vasa efferentia) connect the rete testis with the initial section of the epididymis. There are two basic designs for efferent ductule structure: a) multiple entries into the epididymis, as seen in most large mammals The mucosa of vas deferens is folded and lined by the pseudostratified columnar epithelium. But this lining epithelium is varies with the different part of ductus deferens in different animal. You will find simple columnar epithelium towards the end of the duct Pseudostratified columnar epithelium of the ductus deferens, 150x Despite its appearance pseudostratified columnar epithelium is a simple epithelium. All cells reach the basal lamina, which is the definition of a simple epithelium, but not all the cells reach the lumen. These smalle

proximal part of the ductus deferens was covered with pseudostratified columnar epithelium, which was continuous with simple cuboidal epithelium towards the distal portion. Anatomical studies revealed a large sac-like accessory process that consisted of two non-discrete parts in th ductus deferens (DDE) in chimeric tissue recombinants composed of mouse mesenchyme and rat epithelium or vice versa. Functional cytodifferentiation was examined in these SVM + URE and SVM + DDE tissue recombinants with antibodie Stereocilia. Stereocilia are found in the male reproductive tract and are thought to facilitate absorption in the epidymis and ductus deferens. Stereocilia contain actin filaments When looking at the apical surface of an epithelium, how might you distinguish between the three typical surface specializations in terms of size and cytoskeletal. Stereocilia (or stereovilli) are non-motile apical modifications of the cell.They are distinct from cilia and microvilli, but closely related to the latter.. In structure, they are much longer and thicker than typical microvilli, form single finger-like projections that may be branched, and have more of the characteristics of the cellular membrane proper

Consistent positive immunoreaction was achieved in the ductus deferens epithelium, and immunofluorescence revealed that spermatozoa from the deferent duct were coated with MVDP. Western blot analysis showed the organ specificity of MVDP, which could not be detected in several organs in the mouse The epithelium of the epididymis was pseudostratified and columnar, embedded in a loose connective tissue. The proximal part of the ductus deferens was covered with pseudostratified columnar epithelium, which was continuous with simple cuboidal epithelium towards the distal portion ductus deferens (or vas deferens). cross section, 100x at 35mm. shows: the pseudostratified ciliated epithelium lining the ductus deferens, smooth muscle in the wall (peristaltic waves propel the sperm), and spermatozoa in the lumen. - pseudostratified epithelium bildbanksfoton och bilde The ductus deferens transcriptome. Transcriptome analysis of the ductus deferens can be visualized with regard to specificity and distribution of transcribed mRNA molecules (Figure 1). Specificity illustrates the number of genes with elevated or non-elevated expression in the ductus deferens compared to other tissues

The ductus feferens or vas deferens is a tubular structure of the male reproductive system. It connects the epididymis with the ejaculatory duct. T view the full answe Ductus (vas) deferens: A long straight duct lined by pseudostratified epithelium with some stereocilia. Thick muscular layer with peristalsis to move sperm toward ampulla: Ampulla of ductus deferens: A dilated portion of ductus deferens; same characteristics as ductus deferens: Ejaculatory duc In sum, the longitudinal and serial histologic sections of spontaneously recanalized ductus deferens and those of the contralateral ductus deferens displayed many tortuous epithelial tubules growing from the mucosal epithelium of distal stumps intruding into the fibrous scar tissue toward proximal stumps. 1 of the growing gland-like tubules might perform the spontaneous recanalization Abstract. The vas deferens is the least understood and studied organ of the male reproductive system. It is often considered as simply a tube whereby sperm exit the epididymis at the time of ejaculation, and even though vasectomy is the most common method of contraception in males, little is known about the structure and functions of the epithelial cells lining the normal vas, what regulates. The ductus deferens, the excretory duct of the testis, is the continuation of the canal of the epididymis. Commencing at the lower part of the tail of the epididymis it is at first very tortuous, but gradually becoming less twisted it ascends along the posterior border of the testis and medial side of the epididymis, and, as a constituent of the spermatic cord, traverses the inguinal canal to.

The epithelium of the ductus deferens in rodents showed absorptive, syn-thetic and secretory activities [11, 20], thus providing an appropriate luminal environment for sperm before ejacu The ductus deferens is a thick -walled tube consisting of three concentric layers: mucosa, muscularis, and adventitia. The lumen of the organ is relatively small. The mucosa is composed of a pseudostratified columnar epithelium with stereocilia (similar to the ductus epididymis) and a thin lamina propria rich in elastic fibers,which generally causes the mucosa to form longitudinal folds Further, the epithelium of the ductal portion of vas deferens as well as the ampulla of C. versicolor appears to contribute to the seminal plasma and can also phagocytose dead sperm, whereas in S. pygaea neither of these roles has been established Ductus Deferens (Vas deferens) (Stain - Haematoxylin Eosin) Overview Epithelium mucosa forms low longitudinal folds. lined by a pseudostratified columnar epithelium. cells have long stereocilia. lamina propria is unusually rich in elastic fibres. muscularis is well developed (up to 1.5 mm thick

Ductus Deferens - an overview ScienceDirect Topic

Ductus Deferens - Nonneoplastic Lesion Atla

Epithelium is one of only 4 types of human body tissues.Like all types, it is formed by cells within an extracellular matrix (ECM). The cells in this tissue are tightly packed within a thin ECM. Forming sheets that cover the internal and external body surfaces (surface epithelium) and secreting organs (glandular epithelium). Functions of epithelial tissue are secretion, protection, absorption. Lined by pseudostratified epithelium with stereocilia. The epididymis is a site of sperm maturation (acquisition of potential for movement) and storage. Together with the efferent ductules the epididymis absorbs 90% of the seminiferous fluid. Circular muscle layers propel sperm by peristaltic contractions The ductus deferens, also known as the vas deferens, is a muscular tube that carries sperm superiorly from the epididymis into the abdominal cavity to the ejaculatory duct. The ductus deferens is wider in diameter than the epididymis and uses its internal space to store mature sperm

Ductus deferens (Vas deferens) • Each DF is a thick walled muscular tube with a small irregular lumen that conveys the spermatozoa from the tail of the epididimis to the ejaculatory duct. • Mucosa formed by pseudostratified columnar epithelium (principal cells are shorter) with stereocilia and a lamina propria Epithelial lining of the Ductulus epididymidis Choose a match O Concretions Contains the ductus deferens, nerves and vessels embedded in a loose connective tissue Spermatic cord Layer of muscle that rises and lowers the testis O Muscularis of the vas deferens Layer of smooth muscle fibers that contract fast during ejaculation Simple columnar with basal nuclei and clear supranuclear cytoplasm. The epithelium of the ductus deferens is not secretory, but the presence of numerous small apical vesicles indicates a role in fluid absorption. In addition to the highly folded epithelium, clusters of sperm nuclei are more intimately associated with the apical ampullary epithelium than elsewhere in the ductus deferens. No evidence of phago Studies on ampulla ductus deferentis of man [12, 151 indicate an active exocytosis of secretory vacuoles in the apical cytoplasm of the principal cell. Parts of apical portions of the epithelial cells being shed into lumen of monkey vas deferens were observed [6]. The vas deferent secretions called mouse vas deferens protein (MVDP) [S ductus (vas as in vasectomy) deferens: inner and outer layers of longitudinally oriented smooth muscle, intermediate layer of circular muscle; sympathetic nervous innervation; strong peristaltic contractions expel ejaculum; lined by pseudostratified epithelium thrown into folds (containing lamina propria); dilated distal portion = ampulla: receives short ducts from seminal vesicle to become ejaculatory duct

the goat ductus deferens — tunica mucosa, tunica muscu-laris and tunica adventitia. The epithelium of the mucosa was intensely stained with cytokeratin 18 (CK 18). Th The epididymis is coiled on the outer surface of the testis and continues to become the ductus deferens. A specialized stratified epithelium with spermatogenic cells (germ cells), which give rise to sperm cells, lines the seminiferous tubules the ductus deferens remains tortuous as it exits the cauda. Overall the length of the ductus deferens is reduced by approx-imately 25%, suggesting that the proximal segment has adopted an epididymal-type fate and has been partially incor-porated into the cauda. These findings are consistent with FIG. 1.Paraffin section oftheductus deferens showing themucosa andsurrounding smooth muscle. The epithelium, together with theunderlying connective tissue ofthelamina propria, isthrown. d. Ductus deferens e. None of the above. 4. What is another term for a bulbourethral gland? a. Bartholin's gland b. Prostate gland c. Skene's gland d. Cowper's gland e. Brunner's gland. 5. What are the spherical structures seen in some prostatic alveoli called? a. Psammoma bodies b. Corpora arenacea c. Hassall's corpuscles d. Prostatic concretions e. Pacinian corpuscles. 6

Histology Learning System [ Male Reproductive System, spermatic cord, ductus deferens, epithelium ductus arterio´sus a fetal blood vessel that joins the aorta and pulmonary artery. ductus de´ferens the excretory duct of the testis, which joins the excretory duct of the seminal vesicle to form the ejaculatory duct; called also vas deferens. patent ductus arteriosus see patent ductus arteriosus Riva A., Aümuller G. (1994) Epithelium of the Distal Portion of the Human Spermatic Pathway: Seminal Vesicle, Ampulla Ductus Deferentis, and Ejaculatory Duct. In: Riva A., Riva F.T., Motta P. (eds) Ultrastructure of the Male Urogenital Glands. Electron Microscopy in Biology and Medicine (Current Topics in Ultrastructural Research), vol 11 Specimens of the ductus deferens from normal adult men of proven fertility were examined with the light and electron microscope. The wall of the ductu We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies 5. ductus deferens : Thick muscular wall (to move spermatozoa toward ampulla) lined by pseudostratified columnar epithelium with some stereocilia. 6. ampulla : Dilated portion of ductus deferens. 7. ejaculatory duct : Narrower than ampulla; runs through prostate gland to empty into urethra

ductus deferens (or vas deferens). cross section, 100x at 35mm. shows: the pseudostratified ciliated epithelium lining the ductus deferens, smooth muscle in the wall (peristaltic waves propel the sperm), and spermatozoa in the lumen. - pseudostratified epithelium stock pictures, royalty-free photos & image The ductus deferens or vas deferens is a muscular tube that leads from the epididymis to the prostate gland and functions to rapidly propel sperm during ejaculation.. Examine the images below and these specimens of ductus deferens (sample 1, sample 2).At higher magnification, identify the pseudostratified columnar epithelium with sparse stereocilia, fibroelastic lamina propria, and three thick. The ductus deferens is lined with pseudostratified columnar epithelium which is from BIO ANATOMY at Thomas Edison State Colleg

Epithelium; Smooth muscle; Support tissue; Draw and annotate: A line drawing of the ductus epididymis in which a section of the epithelium is drawn in detail. Vas deferens (ductus deferens)--muscular extension of epididymis which carries sperm to urethra: Slides. Testis Epididymus Ductus deferens: Archive Testis Surrounding the epithelium is a coat of smooth muscle (that thickens distally). At the junction with the ductus deferens (not shown), this coat is trilaminar. In other words, as one moves from head to tail, the epithelium gets shorter, the stereocilia get shorter, and the muscle gets thicker

Ductus Deferens - Inflammation - Nonneoplastic Lesion Atla

  1. Ductus deferens, epon, 35x. Why won't good histology students confuse this with the ureter? ANSWER: Because the ureter has transitional epithelium without stereocilia and the muscle is not quite so thick
  2. c. Movement of sperm toward ductus deferens II. Ductus (vas) deferens A. A thick muscular tube conveying and propelling sperm from duct of epididymis to the ejaculatory duct. B. Composition 1. Mucosa: longitudinal folds produce an irregular lumen a. Pseudostratified columnar epithelium with stereocilia surrounds a narrow lumen b
  3. As one travels distally along the ductus epididymis, the amount of smooth muscle tissue directly ensheathing the tubule increases, aiding in its peristaltic contractions. The pseudostratified epithelium of the epididymis may also be appreciated here and at higher power in the next image

Vas deferens: Also called ductus deferens 30 - 40 cm long tubular structure from tail of epididymis to prostatic urethra at level of verumontanum; distal vas deferens joins seminal vesicle to form ejaculatory duct Rarely present within hernia sacs (Am J Surg Pathol 1999;23:880) Should see complete transection in vasectomy specimen Noun 1. ductus deferens - a duct that carries spermatozoa from the epididymis to the ejaculatory duct vas deferens duct, epithelial duct, canal, channel - a... Ductus deferens - definition of ductus deferens by The Free Dictionary. Structure and function of the epithelium lining the ductuli efferentes, ductus epididymis,. Start studying Reproductive Anatomy. Learn vocabulary, terms, and more with flashcards, games, and other study tools activities verified in the lining epithelium of the paca's vas deferens had been quite similar to those described for prin-.,.). Vas deferens surface epithelium of Agouti paca: fine structural features. Int. J. Morphol., 27(1):89-96, 2009 Ductus Deferens (LP) The vas (or ductus) deferens (pleural vasa deferentia) is the continuation of the epididymis and lies within the spermatic cord along with the testicular artery, the pampiniform plexus of veins, smooth muscle fibres of the cremaster muscle and lymphatics

The ductus def-erens plays an important role in the viability of sperm, as well as its protection against reactive oxygen species and proteases during storage (Hinton et al., 1996). Furthermore, the ampulla of the ductus deferens has been confirmed to plat an active role in sperm nourishment and maturation (Bergerson et al., 1994) 1 Definition. Der Ductus epididymidis ist der Hauptbestandteil des Nebenhodens und ist Teil der Samenwege der männlichen Fortpflanzungsorgane.In ihm vollzieht sich die Reifung der Spermien.. 2 Anatomie. Der Ductus epididymidis beginnt im Kopfteil (Caput) des Nebenhodens, wo er über die Ductuli efferentes mit dem Rete testis des Hodens verbunden ist. Im weiteren Verlauf zieht er vielfach. Prostatic Urethra (Transitional Epithelium) Compound Tubuloalveolar Glands (Pseudostratified Columnar Epithelium) Prostate Specific Antigen: Seminal Colliculus: Periurethral Zone: Fibrinolysin: Prostatic Utricle: Central Zone: Citric Acid: Ejaculatory Ducts: Peripheral Zon

Male reproductive: The Histology Guid

adventitia of ductus deferens - Ontology Browser - Rat Genome Database × Welcome {{ username}} Message Center {{ messageCount }} Messages. Go to. Postnatal development of epididymis and ductus deferens in the rat. A correlation between the ultrastructure of the epithelium and tubule wall, and the fluorescence-microscopic distribution of actin, myosin, fibronectin, and basement membrane Ductus Deferentia. The ductus deferentia (singular - ductus deferens), also called vasa deferentia, are muscular tubes about 45 centimeters long. Each ductus deferens passes upward along the medial side of a testis and through a passage in the lower abdominal wall (inguinal canal), enters the pelvic cavity, and ends behind the urinary bladder Pseudostratified Columnar Epithelium is a type of a columnar epithelium which is actually single layered epithelium but may appear as a stratified The Pseudostratified Columnar Epithelium lining the ductus epididymis and certain other parts of the male reproductive tract does not have cilia It is also found in the ductus deferens A middle or muscular coat thinner than in the ductus deferens and arranged in two layers, an outer longitudinal and inner circular. A mucosa (Mucous membrane ; internal or mucous coat) of the seminal vesicle, is pale, of a whitish brown color, and presents a delicate reticular structure

Ductus Deferens

Ultrastructural evidence for secretion from the epithelium

The ductus deferens begins at the tail of the epididymis, in the lower region of the scrotal sac, the pouch of thin skin that covers the testes and epididymides. It extends into the pelvic region. While ascending to the level of the bladder, the ductus deferens is surrounded by a network of arteries, veins (pampiniform plexus), and nerve fibres, and the whole is covered by layers of connective tissue Non-ciliated cells of the male tract consisted of squamous and low cuboidal cells of the rete testis, granulated columnar cells lining the ductuli efferentes and connective ductules; agranulated columnar cells which formed the epithelium of the ductus epididymidis, ductus deferens, receptaculum and papilla ductus deferentis; and basal cells which were found in increasing number from the ductuli efferentes to the papilla The ductus deferens, or vas deferens, is a fibromuscular tube that is continuation of the epididymis and is an excretory duct of the testis. Each ductus is 30-45 cm in length and serves to transport sperms cells from the respective epididymis to the ipsilateral ejaculatory duct. [ 1

Ductus Deferens (vas deferens) begins at the end of the ductus epididymis as a straight tube with a thick muscular wall. Pseudostratified Epithelium (with stereocilia) similar to that of the ductus epididymis, lines the narrow, irregular lumen of the ductus deferens. Muscular Wall is composed of inner and outer layers of longitudinall Find Histology Ductus Deferens Tissue Show Epithelium stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day DUCTUS DEFERENS & SPERMATIC CORD Slide 31 Vas deferens. The vas deferens (ductas deferens) has a thick muscular wall and a narrow star-shaped lumen. You should note that the smooth muscle is arranged in 3 layers; inner and outer longitudinal and middle circular. The lining epithelium is pseudostratified columnar epithelium On one side of the section you will see a cross section of the ductus (or vas) deferens, which has a circular lumen, lined by a pseudostratified epithelium and surrounded by a very thick wall of smooth muscle

Vas Deferens - an overview ScienceDirect Topic

Sädesledaren, latin: ductus deferens eller vas deferens, är ett rör hos mannen som transporterar spermierna från bitestiklarna till urinröret.. Vid en steriliseringsoperation skär kirurgen av sädesledarna och blockerar båda eller ena av de lösa ändarna på vardera sidan. Detta gör att sperman inte kan ta sig till urinröret och ut, men sperman slutar inte att produceras Reading time: 7 minutes. The epididymis is an essential component of the male reproductive tract. It is a site of sperm storage and maturation until the time of their discharge to the ductus deferens or vas deferens. In this article we aim to cover the embryology, anatomy, histology and functions of the epididymis The ductus (vas) deferens possesses three layers of smooth muscle in its wall, whereas the other genital ducts do not. Like the ductus epididymidis, the ductus deferens is lined by a pseudostratified columnar epithelium with principal cells that possess nonmotile stereocilia (see Chapter 20 III B 3)

Efferent ducts - Wikipedi

  1. al cavity through.
  2. Ductus deferens might have narrower meaning than Epithelial duct. Find out the relation between terms Epithelial duct and Ductus deferens as hyponyms
  3. We use cookies to enhance the usability of our website. If you continue, we'll assume that you are happy to receive all cookies. More information
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  5. ductus deferens (or vas deferens). cross section, 100x at 35mm. shows: the pseudostratified ciliated epithelium lining the ductus deferens, smooth muscle in the wall (peristaltic waves propel the sperm), and spermatozoa in the lumen. - epididymis stock pictures, royalty-free photos & image
  6. Samenleiter [Ductus deferens] translation in German - English Reverso dictionary, see also 'Samen',Samenzelle',Samenhändler',Samenspender', examples, definition, conjugation Translation Context Spell check Synonyms Conjugatio
  7. al vesicles -Produce viscous alkaline se

Ductus Deferens Histology - Complete Histological Features

  1. The epithelium of the ED showed weaker or no acid phosphatase activity after ligation. Immunoglobulin G-containing cells increased in number in the interstitium. These results showed that ligation of the ductus deferens in the fowl causes granuloma in the RT and ED, and that epithelial cells, macrophages and granuloma are engaged in the removal of spermatozoa
  2. Non-ciliated cells of the male tract consisted of squamous and low cuboidal cells of the rete testis, granulated columnar cells lining the ductuli efferentes and connective ductules; agranulated columnar cells which formed the epithelium of the ductus epididymidis, ductus deferens, receptaculum and papilla ductus deferentis; and basal cells which were found in increasing number from the.
  3. The ductus epididymidis (epididymis) consists of three major regions: head (caput), body (corpus), and tail (cauda). Chapter 5: Functional anatomy of reproductive systems: genital organs Structure and function of the epithelium lining the ductuli efferentes; ductus epididymidis and ductus deferens in the rat
  4. ciliated epithelium . Where does the ductus deferens travel through and where does it separate from the outer spermatic cord components, and what structure does it extend posteriorly along? The pelvic cavity, the bladder . what is the ampulla.
  5. This virtual DUCTUS (VAS) DEFERENS slide shows two complete cross sections of the ductus deferens. One is left and one is right. This tissue was donated from an elective sterilization (i.e. a vasectomy). The ductus (or vas) deferens has a very thick wall of smooth muscle and is lined with pseudostratified columnar epithelium
  6. imal admixture of.

Epithelium - Slide #2

  1. The ductus deferens of the mouse contains a major protein with a molecular weight of 34.5 kd called mouse vas deferens protein (MVDP). Immunofluorescence histochemistry and immunoblotting with monoclonal antibodies have been used to investigate the localization, tissue, and species distribution, androgen-regulation, and developmental expression of this protein
  2. al duct) - a muscular tube 45 centimeters in length leading from the epididymus up into the body cavity (Fig 28.1 & 28.3) unites with the ejaculatory duct and empties its contents into the urethra . lined with pseudostratified columnar epithelium & covered with heavy coating of muscl
  3. ductus (vas deferens). male epithelium and spermatozoa. 1000x - ductus deferens stock pictures, royalty-free photos & images digital illustration of male reproductive system - ductus deferens stock illustration
  4. The epithelium rested on well-defined basement membrane. Lightly and darkly stained nuclei at different levels within the epithelium are constantly present. The ductus deferens lumen average diameter was (39.11 ± 4.52 to 66.1 ± 18.03 µm) filled with sperms
  5. ductus deferens (or vas deferens). cross section, 25x at 35mm. shows a cross section of the ductus deferens, abundant smooth muscle in the wall, pseudostratified ciliated columnar epithelium, and spermatozoa in the lumen. - ciliated epithelium stock pictures, royalty-free photos & image
  6. Translations in context of Samenleiter Ductus deferens in German-English from Reverso Context: Unter dem Einfluss von Androgenen entwickeln sich Reste der Urniere Mesonephros, die Wolffschen Gänge, zum Nebenhoden Epididymis, Samenleiter Ductus deferens und zu den Samenbläschen
  7. 190 A. S. Ramos FIGURE 2. Light micrographs showing the various changes of the epithelium of the (a) proximal vas, (b) middle vas, (c) distal vas, and (d) the ampulla of the macaque monkey.a. Proximal vas deferens showing low columnar pseudostratified epithelium with uniform and short stereocilia
File:Testis histology 015SIU SOM Histology ERGEpithelium - Histology 1 with Pawlina at Mayo MedicalHistology of male reproductive systemHISTOLOGY DIAGRAMS: Special histology- specific points

May 24, 2020 - Find Blue White Capsule Pills On Blue stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day Expression of SPDYC (Ringo2) in ductus deferens tissue. Antibody staining with HPA039891 in immunohistochemistry. We use cookies to enhance the usability of our website. If you continue, we'll assume that you are happy to receive all cookies. More information. Don't show this again Ductus Deferens The ductus epididymis continues as the ductus deferens which is also lined by a pseudostratified columnar epithelium. However, the lamina propria submucosa of the ductus deferens is areolar loose connective tissue, and the tunica muscularis is very thick and contains two layers of smooth muscle The vas deferens is the relatively straight, muscular portion of the duct which carries sperm cells from the epididymis to the ejaculatory duct. Like the epididymal duct, the vas deferens is lined by a two-layered columnar epithelium. The vas deferens has a thick, three-layered muscular wall

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