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XI. Splanchnology. 3c. 2. The Ductus Deferens. Gray, Henry. 1918. Anatomy of the Human Body. 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 abdominal inguinal ring. A small triangular area of the fundus of the bladder, between the ductus deferentes laterally and the bottom of the rectovesical excavation of peritoneum above, is in contact with the rectum. www.bartleby.com /107/259.html   (580 words)

Olympus Microscopy Resource Center: Anatomy of the Microscope - Brightfield Microscopy Digital Image Gallery - Ductus ... The ductus deferens, also known as the vas deferens, is a paired duct, or tube, that is part of the male reproductive system in mammals. Thick-walled, the ductus deferens is composed of several layers of tissue. As the ductus deferens rises upwards from the epididymis towards the bladder, it also comes to be surrounded by nerve fibers, arteries, and veins, and the complex structure further encased in connective tissue is referred to as the spermatic cord. www.olympusmicro.com /primer/anatomy/brightfieldgallery/ductusdeferens10xsmall.html   (340 words)

beavercleaver.net - Male Reproductive Plumbing The sperm transport themselves through the vas deferens, to the prostate gland located at the front of the bladder, where at the proper time, sperm join seminal fluid from the prostate, and are expelled through the urethra. Within these cords, there is the principal artery supplying blood to the testes, which runs through a plexus of veins, nerves, and the ductus deferen, which is the tube that the sperm travel, and all of this is bound together by the perivasal sheath. The older term for the ductus deferens is "vas deferens" (from l. www.beavercleaver.net /histology.htm   (571 words)

Glossary - Center for Applied Reproductive Science Receives sperm from the testis and continues as the ductus deferens. The anatomic and physiologic connection between the uterus and the ovary which serves to transport the egg and sperm, as the site of fertilization and support and transport the conceptus in route to the uterus. A varicose vein around the ductus deferens and the testes. www.ivf-et.com /glossary.htm   (1458 words)

ductus deferens (vas deferens) Variation in nitric oxide synthase-immunoreactive nerve fibres with age and along the length of the vas deferens in the rat. Testosterone metabolism by proximal and distal regions of the vas deferens from immature and mature rats. Blood barriers of the epididymis and vas deferens act asynchronously with the blood barrier of the testis in the mink (Mustela vison). www.arclab.org /node_pages/1380.html   (421 words)

Vascularization of Testis, epididymis and ductus deferens of Rabbit   (Site not responding. Last check: 2007-10-10) Vascularization of Testis, epididymis and ductus deferens of Rabbit Vasculature of Testis, epididymis and ductus deferens of Rabbit. The vasculature of the testis, epididymis and ductus deferens was studied in twenty adult rabbits using X-ray apparatus. www.vfu.cz /acta-vet/vol70/003-01.htm   (206 words)

Reproductive System / Male Reproductive System / Duct System The ductus deferens, also called vas deferens, is a fibromuscular tube that is continuous (or contiguous) with the epididymis. Sperm are stored in the proximal portion of the ductus deferens, near the epididymis, and peristaltic movements propel the sperm through the tube. The proximal portion of the ductus deferens is a component of the spermatic cord, which contains vascular and neural structures that supply the testes. training.seer.cancer.gov /module_anatomy/unit12_2_repdt_male2_duct.html   (489 words)

Vas deferens - Wikipedia, the free encyclopedia The vas deferens, also called ductus deferens, (Latin: "carrying-away vessel") is part of the human male anatomy. During ejaculation the wall of the vas deferens thickens and thins itself, thus propelling the sperm forward. Vasectomy is a method of contraception where the vasa deferensa are permanently cut. en.wikipedia.org /wiki/Vas_deferens   (173 words)

HISTOLOGY   (Site not responding. Last check: 2007-10-10) The ductus deferens is a thick-walled tube (30 cm long; same length as femur) surrounded by 3 layers of smooth muscle: inner and outer longitudinal layers and middle circumferential layer. From scrotum to inguinal canal, ductus is sheathed in spermatic cord. As vas deferens reaches its terminus it dilates to form the ampulla of the vas deferens. medic.med.uth.tmc.edu /lecture/Main/male2.htm   (1421 words)

Elastic fibres of the human ductus deferens.   (Site not responding. Last check: 2007-10-10) The distribution of elastic fibres in the human ductus deferens from birth to senility was studied by light and electron microscopy. Elastic fibres are lacking in the ductus deferens in infants and children. The ductus deferens of ageing subjects shows fragmentation and disorganisation of the elastic fibre layers of the lamina propria. www.arclab.org /medlineupdates/abstract_6654739.html   (268 words)

Histology IJS (1) The ductus deferens is lined by a pseudostratified columnar epithelium with stereocilia (as the epididymis). The ejaculatory duct is the continuation of the ductus deferens, from the point of connection with the duct of the seminal vesicle, through the substance of the prostate, to the connection with the urethra. The structure (and function) of the ejaculatory duct is the same as the ductus deferens. www.abdn.ac.uk /~bms027/PP2.H1.8.html   (129 words)

Archives of Pathology & Laboratory Medicine: Human papillomavirus infection of the epididymis and ductus deferens: ...   (Site not responding. Last check: 2007-10-10) Objective.-To assess the presence of HPV in the epididymis and ductus deferens in nontuberculous epididymitis. Design.-Epididymal samples obtained from 17 patients and epididymal and ductus deferens samples from 5 patients surgically treated for nontuberculous epididymitis were analyzed by nested polymerase chain reaction for the presence of HPV DNA. Criteria for selection were preservation of epithelium-lined structures (at least several cross-sections of the ductus epididymidis or ductuli efferentes testis and a full cross-section of ductus deferens), or any focus of squamous metaplasia or koilocytic atypia4 and no or minimal admixture of testicular tissue. newssearch.looksmart.com /p/articles/mi_qa3725/is_200311/ai_n9340083   (1050 words)

Pax-2: a developmental gene constitutively expressed in the mouse epididymis and ductus deferens.   (Site not responding. Last check: 2007-10-10) Pax-2: a developmental gene constitutively expressed in the mouse epididymis and ductus deferens. Pax-2: a developmental gene constitutively expressed in the mouse epididymis and ductus deferens.Expression in these structures in adult mice was confirmed by Northern analysis and ribonuclease protection assays. CONCLUSION: Pax-2 is a transcriptional regulator expressed in the epithelium of the ductus deferens and epididymis and may be a regulator of epithelial genes involved in sperm maturation and support. www.pdg.cnb.uam.es /UniPub/iHOP/gp/621173.html   (123 words)

Vas deferens The duct of the epididymis enlarges into the ductus deferens, which is convoluted only in its upper regions. The lumen of the vas deferens (as it is also called) is relatively small in relationship to its thick walls due to the presence of layers of muscle. This is another view of the Vas deferens using a different stain to show the 3 layers of muscle that surround the vas deferens. www3.umdnj.edu /histsweb/lab16/lab16ductusdeferens.html   (334 words)

Fertility and Sterility in the Buck From there the sperm travel through the abdominal cavity in the ductus deferens to the urethra where it exits the body through the penis. When the sperm reaches the ductus deferens, it is mature. The urethra and ductus deferens join near the urinary bladder, so if the urethra is blocked neither sperm or urine will be able to exit the body. kinne.net /fertbuck.htm   (2287 words)

Ductus Deferens diverticula ampullae ductus deferentis (diverticula of ampulla of ductus deferens). sinuosités de l'ampoule du canal déférent (diverticula of ampulla of ductus deferens). Diverticula ampullae (diverticula of ampulla of ductus deferens). www.websters-online-dictionary.org /definition/Ductus+Deferens   (183 words)

Effects of norepinephrine on cyclic nucleotide levels in the ductus deferens of the rat.   (Site not responding. Last check: 2007-10-10) Effects of norepinephrine on cyclic nucleotide levels in the ductus deferens of the rat. Effects of norepinephrine on cyclic nucleotide levels in the ductus deferens of the rat.The effect of 1-norepinephrine on cyclic nucleotide levels was studied in rat ductus deferens. These findings indicate that in the ductus deferens alpha-adrenergic receptors are involved in the effect of catecholamines on cyclic GMP, and beta-adrenergic receptors are involved in the effect on cyclic AMP levels. www.pdg.cnb.uam.es /UniPub/iHOP/gp/2320980.html   (190 words)

Anatomy Tables - Pelvis & Pelvic Viscera ductus deferens is continuous with the tail of the epididymis; it passes through the superficial inguinal ring, inguinal canal and deep inguinal ring to reach the posteroinferior surface of the bladder where it joins with the duct of the seminal vesicle to form the ejaculatory duct duct formed by the union of the duct of the seminal vesicle and the ampulla of the ductus deferens spermatic cord comprises the: ductus deferens, testicular a., pampiniform plexus, deferential a. anatomy.med.umich.edu /reproductive_system/pelvicvisc_tables.html   (3420 words)

Blue Histology - Male Reproductive System The internal male genitalia consist of the testes with the adjoining epididymis, the vas deferens and the accessory sex glands, namely the seminal vesicles, the prostrate and the bulbourethral glands (the latter sometimes are included in the external genitalia). Note that ductuli efferentes are located mainly in the head of the epididymis, whereas the ductus epididymidis forms the body and tail of the epididymis. Identify the cell types found in the ductus epididymidis, stereocilia and the thin layer of smooth muscle which surrounds both types of ducts. www.lab.anhb.uwa.edu.au /mb140/CorePages/MaleRepro/malerepro.htm   (2750 words)

Canine Reproduction Part 4 One end of the epididymis tapers into the ductus deferens, the tube through which the mature sperm that are stored in the epididymis will pass to leave the scrotum. The ductus deferens leads into the prostatic urethra. During ejaculation, the sperm will be drawn out of the epididymis through the ductus deferens and will combine with semen, secreted by the prostate gland, in the prostate urethra before being expelled. www.labbies.com /reproduction4.htm   (1510 words)

The Male Reproductive System The ductus deferens is the continuation of the duct of the epididymis. Separating from the other elements of the spermatic cord—the blood vessels, nerves, and lymph vessels—at the ring, the ductus deferens makes its way through the pelvis toward the base of the prostate, where it is joined by the seminal vesicle to form the ejaculatory duct. A part of the ductus that is dilated and rather tortuous, near the base of the urinary bladder, is called the ampulla. www.becomehealthynow.com /article/bodyreproductivemale/795   (2064 words)

The Stallion   (Site not responding. Last check: 2007-10-10) Blockage of the epididymis or ductus deferens would prevent sperm from entering the urethra. The ductus deferens is a long muscular tube which runs up from the tail of the epididymis into the abdomen of the stallion and into his urethra. It carries urine from the bladder and sperm from the ductus deferens. maine.maine.edu /~rcausey/stud.HTM   (1730 words)

ARS | Publication request: Attempts to Isolate Naturally Occurring Campylobacter, Salmonella,a ND Clostridium ... Limited necropsy to remove ductus deferens, testes and ceca without contamination from blood and other tissues was carried out. Clostridium perfringens was isolated from one of the 15 ductus deferens, while no Campylobacter or Salmonella were isolated from this tissue. The data suggest that the contamination of semen by these foodborne pathogens is a result of sources (cecal/fecal contamination) external to the testes and ductus deferens. ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=140759   (382 words)

COX ET AL., Spring 2005   (Site not responding. Last check: 2007-10-10) An aseptic necropsy was performed to remove the ductus deferens, testes, and ceca without surface contamination from blood and other tissues. Clostridium perfringens was isolated from 1 of the 15 ductus deferens, whereas no Campylobacter or Salmonella were isolated from this tissue. These data suggest that the contamination of semen by these foodborne pathogens is via fecal or cecal contamination as the semen passes through the cloaca and not from bacterial colonization of the testes and ductus deferens. www.poultryscience.org /japr/abs/05/r0510126.htm   (338 words)

Male Internal Genital Organs   (Site not responding. Last check: 2007-10-10) The ductus deferens crosses the ureter near the Lymph vessels from the ductus deferens end in the joins the ductus deferens to form the ejaculatory duct. www.geocities.com /medinotes/male_int_genitalia.htm   (281 words)

Lab Exercises- Testis and ducts After the sperm leave the epididymus, they travel down the vas deferens (ductus deferens). The DUCTUS DEFERENS or Vas deferens is seen in slide 72 and also in slide 73. The Vas deferens penetrates the Prostate gland and becomes the ejaculatory duct. microanatomy.net /Male_Reproductive/testis_and_ducts.htm   (1397 words)

Zoology 531 - Lecture Outline 11 - Reproductive System Ductus Deferens (Vas Deferens): Drainage of Ductus Epididymidis 3) Correspondence to Mucosal Epithelium of Ductus Deferens 2) Correspondence to Mucosal Lamina Propria of Ductus Deferens www.ucalgary.ca /~embryo/z531/531lo11.html   (689 words)

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