KINS 1224 Chapter Notes - Chapter 27: Ureter, Vas Deferens, Androgen-Binding Protein
26 Apr 2016
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The testes in the scrotum must be held out at 35 c. These 3 mechanisms regulate the temp of the testes . Cremaster muscle- strips of abdominal muscle that enmesh the spermatic cord. When it"s cold, the cremaster contracts and draws the testes closer to the body to keep them warm. When it"s warm, the cremaster relax and the testes are suspended from the body. Dartos muscle- smooth muscle that contracts when it"s cold and the scrotum becomes taut and wrinkled. The tautness of the scrotum helps hold the testes snugly against the warm body reducing surface area reducing heat loss. Pampiniform plexus- a extensive network of veins in the testes. Without this plexus warm arterial blood with heat the testis inhibiting the sperm productive. The testis are both endocrine and exocrine glands that produce sex hormones and sperm. Tunica albuginea- the testis itself has a white fibrous capsule.
