ANAT 216 Study Guide - Midterm Guide: Mesoderm, Amnion, Parenchyma

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 216
• Professor: Leslie W Mac Kenzie

Document Summary

Moved down and forward to abdominal wall. Gubernaculum testis: scrotal ligament that forms to attach the bottom of the testis to the scrotum to minimize movement. Move in third trimester bringing a pocket of peritoneal cavity: internal (deep) ring made at internal spermatic fascia layer, external (superficial) ring made at external spermatic fascia layer. Testicular arteries: branch off abdominal aorta. Dartos muscle: in skin, makes balls wrinkly. Cremaster: deep scrotal wall, pulls testes up when cold, sexual arousal, 2 deg cooler. Visceral and parietal: covers lateral and anterior walls. Turnica albuginea: fibrous, divides testis into 250-300 lobules. Divide to produce one spermatogonia and one primary spermatocyte. Primary spermatocyte divides to produce secondary spermatocyte: secondary spermatocyte divides to produce a pair of spermatids, stimulated by lh and fsh and testosterone. Spermiogenesis: matures spermatids to spermatozoa, sertoli cells. Immune system won"t attack body but will attack sperm so we need barrier. Structure of spermatozoa: 65um long, head flat oval.