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2. Anatomy-1.pptx

  2. Testis • Testis has ellipsoid- shaped. • Testes develop in the abdomen and move before birth into the scrotum. • The left testis usually lies at a lower level than the right.
  3. Testis The testis are covered by: • A closed sac of peritoneum (the tunica vaginalis), which originally connected to the abdominal cavity. Normally after testicular descent, the connection closes, leaving a fibrous remnant. • It is covered by a fibrous capsule called the tunica albuginea.
  4. Testis
  5. Epididymis • The epididymis is a single, long coiled duct that courses along the posterolateral side of the testis. • The tunica vaginalis covers the epididymis with the exception of the posterior border.
  6. Epididymis • Structurally, epididymis divided into : – Head – Body – tail
  7. Epididymis It has two distinct components: – The efferent ductules, which form an enlarged coiled mass that sits on the posterior superior pole of the testis and forms the head of the epididymis; – The true epididymis, which is a single, long coiled duct into which the efferent ductules all drain, and which continues inferiorly along the posterolateral margin of the testis as the body of epididymis and enlarges to form the tail of epididymis at the inferior pole of the testis.
  8. Ductus deferens • (Latin: "carrying-away vessel"), also called vas deferens. • The ductus deferens is a long muscular duct that transports spermatozoa from the tail of the epididymis to the ejaculatory duct.
  9. Ductus deferens course • The vas arises from the tail of the epididymis and traverses the inguinal canal to the deep ring, passes downwards on the lateral wall of the pelvis almost to the ischial tuberosity and turns medially to cross the ureter posterior to the bladder. • It continues inferomedially along the base of the bladder, anterior to the rectum, almost to the midline, where it is joined by the duct of the seminal vesicle to form the ejaculatory duct.
  10. Ductus deferens course • The terminal part of the vas deferens is dilated to form the ampulla of the vas deferens. • The ejaculatory duct penetrates through the prostate gland to connect with the prostatic urethra.
  11. Seminal vesicle • The seminal vesicles are an accessory gland of the male reproductive system . • The seminal vesicles are two lobulated organs about 2 in. (5 cm) long lying on the posterior surface of the bladder .
  12. Seminal vesicle • On the medial side of each vesicle lies the terminal part of the vas deferens. • Posteriorly, the seminal vesicles are related to the rectum. • Inferiorly, each seminal vesicle narrows and joins the vas deferens of the same side to form the ejaculatory duct.
  13. Blood Supply of Seminal vesicle Arteries • The arterial blood supply from, the inferior vesicle and middle rectal arteries. Veins • The veins drain into the internal iliac veins.
  14. Ejaculatory Ducts • The two ejaculatory ducts are each less than 1 in. (2.5 cm) long and are formed by the union of the vas deferens and the duct of the seminal vesicle. • The ejaculatory ducts pierce the posterior surface of the prostate and open into the prostatic part of the urethra, close to the margins of the prostatic utricle; their function is to drain the seminal fluid into the prostatic urethra.