PSYC 100 Lecture 2: Week 14 Lecture Notes - PSYC 100B

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jeremy G. Stewart

Document Summary

Human development begins in utero and lasts about 40 weeks (9 months) before birth. Each are haploids (half; each contains half of the genetic material needed) Conception forms a diploid (both sets of genetic material) zygote in the fallopian tube. Lasts until cells attach to uterine wall (8-10 days) Lots of cell divison happens during this time via cleavage. Cleavage forms from blastomeres, resulting in a morula. As the 16-cell morula enters the uterus, the cells begin to differentiate. Blatocyst contains two portions, inner cell mass and an outer call mass (which is cal. Morula forms a fluid filled centre, turning into a blastocyst. Outer layer of blatocyst becomes placenta and amniotic sac. Begins when the blastocyst implants in the uterine wall. Amniotic sac filled with fluid and allows for constant environment. Attaches to inside of amniotic sac and umbilical cord is called a trophoblast) Attaches to inside of amniotic sac and umbilical cord.