Psychology 2040A/B Chapter Notes - Chapter 3: Prenatal Development, Blastocyst, Neural Tube

• School: Western University
• Department: Psychology
• Course: Psychology 2040A/B
• Professor: Joanna Sinos

Document Summary

Conception: occurs when a single sperm cell unites with an ovum in a process called fertilization. Creation of fertilized egg (zygote) -> cell division -> attachment of zygote to the uterine wall. Blastocyst: groups of cells that"s will eventually develop into the embryo. Trophoblast: outer later of cells that provides nutrition and support for embryo. Implantation: attachment of the zygote to the uterine wall. Begins when blastocyst attaches to uterine wall -> mass cell is called an embryo. Endoderm: inner layer of cells -> develops into digestive and respiratory system. Mesoderm: middle layer -> becomes the circulatory system, bones, muscles, excretory and reproductive system + neural tube develops. Ectoderm: outermost layer -> becomes the nervous system + brain, sensory receptors, and skin parts. Amnion: bad containing clear fluid where the embryo floats. Placenta: disk-shaped group of tissues where small blood vessels from the mother and offspring intertwine. Organogenesis: organ formation during the first 2 months of prenatal development.