PSY 202 Chapter Notes - Chapter 3: Fluid And Crystallized Intelligence, Prefrontal Cortex, Parenting Styles

• School: Cal Poly
• Department: Psychology
• Course: PSY 202
• Professor: Connie Hanrietty- Church

Document Summary

List and discuss the stages of prenatal development and harmful. Chapter 3 development over the life span environmental influences during this period. Prenatal development is divided into three stages, which are the germinal, the embryonic, and the fetal. Germinal stage starts when the male sperm joins with a female ovum (egg) at fertilization. The single celled fertilized egg is called a zygote. The zygote starts to divide and becomes a cluster of cells within 10-14 days to attach to the walls of the uterus. The inner portion of the cluster becomes the embryo and the outer portion forms part of the umbilical cord and placenta. The placenta connects to the embryo by the umbilical cord serves as the connection of food from the mother. Nutrients enter and waste exits with some harmful substances being screened out. Embryonic stage occurs two weeks after fertilization after implantation is complete until the eighth week of contraception when the embryo is 1. 5 inches long.