Anatomy study note · Abdomen

Vas deferens

A thick-walled muscular duct that carries spermatozoa from the tail of the epididymis to the urethra. It lies in the back of the spermatic cord.

Key points

• Epididymis tail → urethra (via the ejaculatory duct).
• Palpable in the posterior spermatic cord.
• Cord coverings: external spermatic, cremasteric, internal spermatic fasciae.
• Cut in vasectomy.
• Ductus deferens: mesonephric duct.
• Thick three-layer smooth muscle wall.

The full note in the atlas also covers

Features · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 6, PDF pp. 731–736
• Inderbir Singh’s Human Embryology, ch. 16, PDF pp. 303, 305
• BRS Cell Biology & Histology, 7th ed., ch. 20, PDF pp. 368, 370

More from the abdomen

• Abdominal aorta
• Abdominal lymph nodes
• Appendix
• Ascending colon
• Biliary tree
• Caecum
• Coeliac trunk
• Descending colon
• Duodenum
• Epididymis
• External oblique
• Gallbladder

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