ANAT 216 Lecture Notes - Lecture 26: Superficial Inguinal Ring, Deep Inguinal Ring, Vas Deferens
2 Oct 2017
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Testis (where sperm are produced) (sperm mature here) Urethra (opening for sperm and urine) (reading material: chapter 27 pages 716-723) Thransport through vas deferens to ejaculatory duct joining urethra. Ejaculate, sperm, secretions from prostate gland, bulbourethal gland and seminal vesicles. Corpus caversum and corpus spongiosum are muscles of penis. Runs through inguinal canal and keeps structure suspended. Comprised of nerves, blood vessels, lymphatic vessels, and vas deferens (genitofemoral nerve, deferential artery, ductus deferens, pampiniform plexus, testicular artery) Pampiniform plexus network of veins surrounding testicular artery (**regulates temperature) veins have cooler blood (about 6degrees lower) scrotum. Dartos smooth muscle (tonic contractions give scrotum its wrinkled appearance, when relaxed, the scrotum is smooth) (skeletal muscle fibres and controls the position of the scrotum and testes. When cold or sexually aroused the testes pull closer to the body for warmth) **penis must be kept at optimal temperature! (optimum temp for sperm development is 2oc below body temp . controlled by muscles)
