HLTH 210 Study Guide - Midterm Guide: Secondary Sex Characteristic, Body Plan, Cloaca

• School: University of Waterloo
• Department: Health Studies
• Course: HLTH 210
• Professor: David- Antoine Williams

Document Summary

Module 2: prenatal and early postnatal growth and development. Part 1 normal prenatal growth and development: Formation of embryonic tissues after implantation: blastocyst contains inner cell mass and trophoblast. Secretes factors to attract maternal blood vessels. Remodels the maternal blood vessels: syncytiotrophoblast. Multinucleated body that digests uterine tissue: chorion embryonic contribution to the placenta. Functions of amnion and yolk sac: amniotic cavity filled with amniotic fluid. Primitive blood circulation for 2nd and 3rd week. After week 4 greatly reduces in size as placenta takes over nourishment function. Source of blood cells and primordial germ cells. Allantois is out pocketing that serves as primitive excretory duct that eventually become part of urinary bladder. Embryogensis and gastrulation two layers to three layers via gastrulation pluripotency to multipotency primitive streak or indentation visible on dorsal surface of embryo cells migrate toward and thru primitive streak and form two layers.