male repro epididymis vas seminal vescile

Maj Rishi Pokhrelrongon28us@gmail.comSlideshare.net

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