Physiology 3120 Study Guide - Circulatory System, Endometrium, Epididymis

• School: Western University
• Department: Physiology
• Course: Physiology 3120
• Professor: Tom Stavraky

Document Summary

Important in disease and infection (can break down: blood testes barrier protects immune system from foreign substances (cid:224) spermatogonia divide by mitosis or differentiate into spermatocytes (cid:224) the walls of the tubules consist of diploid spermatogonia (cid:224) meiosis of each primary spermatocyte produces 4 haploid spermatids (cid:224) then the spermatids differentiate/mature into sperm. Spermatozoa: switched on at puberty, entire process occurs in seminiferous tubules/sertoli cells, spermatogonia cells undergo mitotic divisions providing a constant course of cells for subsequent meiotic divisions (from stem cells for gamete production, spermatocytes cells in the process of becoming sperm, germ cells are always in contact with sertoli cells. In any given section of the tubule, spermatogenesis proceeds in a regular sequence: entire process takes about 64 days (blood testes barrier (cid:224) lumen, the normal human male produces 30 100 million sperm/day, spermatogenesis requires temperatures <37 degrees, distance from body, blood flow: arterial blood in is hot, venous blood is cooler.