PSYC 2500H Chapter Notes - Chapter 4: Attention Deficit Hyperactivity Disorder, Thalidomide, Miscarriage
29 Mar 2017
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That occurs btwn moment of conception & beginning of birth process) Germinal period/period of zygote (1st phase of dev. From conception until organism becomes firmly attached to uterine wall) 6-10 days after conception implantion (burrowing of blastocyst into uterus lining), done 10-14 days after ovulation. Once implanted the blastocysts outer layer forms 4 support structures that protect & nourish dev: amnion (watertight membrane that surrounds dev. 3)umbilical cord (contains blood vessels that connects the embryo to the placenta) Placenta (organ formed from lining of uterus & chorion, provides respiration & nourishment & eliminates waste) Embryo (the prenatal organism from the 3rd-8th week after conception) Fetus (the prenatal organism from the 9th week until birth) Period of the embryo (2nd phase of dev. Lasts from 3-8 week during which major organs & anatomical structure form) Period of the fetus (3rd phase from 9thweek to birth, all major organ systems begin to function & fetus grows rapidl)
