PSYC 100 Lecture Notes - Lecture 24: Fallopian Tube, Blastocyst, Blastomere

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: n/a

Document Summary

Hum dev begins in utero and lasts about 9 months before birth. Differentiates and becomes 2 parts: inner cell mass becomes the embryo. trophoblast becomes protective outer layer. Sperm and ova are gametes (specialized reproductive cells) Each are haploids (half: each contains half of the genetic material needed) When they merge, they become a diploid (both sets of genetic materials) Attaches to inside of amniotic sack and umbilical cord. Limits transfer of harmful chemicals and infectious agents. Skeletal, organ and nervous sys become more dev and specialized. Major growth (mostly in last 2 moths/8 weeks of pregnancy) Single most important non-genetic factor affecting fetal dev. Poor nutrition (low birth weight, increase risk for diseases, illnesses and cog deficits. High levels are associated w/prematurity and low birth weight, psychological symptoms (anxiety, depression, aggression) Effects depe(cid:374)d o(cid:374) the ti(cid:373)e of exposure, a(cid:373)ou(cid:374)t of use .