PSY 2105 Chapter Notes - Chapter 4: Prenatal Development, Amniotic Sac, Umbilical Cord

• School: University of Ottawa
• Department: Psychology
• Course: PSY 2105
• Professor: Gustavo Gottret

Document Summary

(cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Fertilization of the egg by the sperm. 9th to 38th week: changes for zygote btwn conception and end of 2nd week of development. Prenatal development begings w conception, goes thru period of zygote, period of embryo, period of fetus. Cell mass rapidly differentiates into organs (hearts, kidneys, eyes, ears, it is now an embryo. Ns, brain) and support structures (amniotic sac, placenta, umbilical cord) Cluster of cells transform into complex and differentiated organism fetal period begins: fetus from 9th week to birth. Primary task is growth and further development of organ systems. Unable to survive before 23-24 weeks of fetal age. Increasing levels of fat in skin (thermal protection) Schematic representation of the vents of the 1st week of human development. Prenatal environment (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1)