male repro epididymis vas seminal vescile
TRANSCRIPT
Maj Rishi [email protected]
Introduction• Parts – Testis– Genital ducts• Epididymis• Ductus Deferens
– Accessory Glands• Seminal Vesicles• Prostate• Bulbouretheral glands
– Penis
Epididymis• Along posterior (post-lat)
border of testis
• Single long tube, coiled – 6 m
• Receives efferent ductules at head
• Continuous with Ductus Deferens
• Parts: head, body, tail
Epididymis• Sinus of epididymis: narrow slit
b/w epididymis and testis
• Blood supply: branch from testicular A
• Dev: mesonephric duct
• Appendix of epididymis: remnant of mesonephric tubule
• Paradidymis: at lower end of spermatic cord
Histology
• Smooth regular lumen
• Pesudostratified columnar with stereocilia
• Circularly arranged smooth muscle fibres – Thicker at distal end
Epididymis
Epididymis
Ductus / vas Deferens• Thick walled muscular tube
• Tail of epididymis -> spermatic cord -> Enters abd at deep ring -> side wall & floor of pelvis ->back of bladder ->
Course & Relations• At deep inguinal ring: hooks around inter-foveolar
ligament & inf epigastric A,
• Crosses ext iliac A & V, obliterated umbilical artery, obturator N, A & V,
• Cross above the ureter, approaches opposite fellow, turn downward and dilate to form ampulla
• Join with seminal vesicle to form ejaculatory duct
• Blood supply: artery to vas, br of inf vesical artery
Histology• Small lumen folded irregular• Pesudostratified columnar
ep with stereocilia• Lamina propria – Fibro
elastic (thin)• Muscular layer - 3, Thick,
palpable (cord like)• Adventitia - fibroelastic• Surrounded by arteries,
nerves, lymphatics & pampiniform plexus
Seminal vesicle
• Paired, thin walled, elongated, lobulated sac
• Blind tube folded on itself
• On base of bladder above the prostate,
• Post – rectovesical fascia
Seminal vesicle• Join lower end of ampulla
of vas -> ejaculatory duct
• 80% of seminal fluid,
imparts motility
• Vesical & middle rectal A
• Dev: mesonephric duct
Applied anatomy
• Vasectomy