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15 Cards in this Set

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prenatal period
untill birth
postnatal period
after birth untill death
prenatal stage of development
begins at time of firtilization untill birth of child. 39 weeks
embryology
study of development before birth
zygote
fertilized ovum
morula
about 3 days... a solid mass of cells
blastocyst
a hollow ball of cells... embryo reaches uterus
yolk sack
provides production of blood cells
amniotic cavity
"bag of waters" shock absorbing
chorion
develops onto an important fetal membrane in the placenta
placenta
provides for exchange of nutrients between mother and baby
chorionic villi
connect blood vessels of the chorion to the placenta
gestation period
lenght of pregnancy.. 39 weeks
trimesters
the three sections of the gestation period
1st trimester
1st 3 months..