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Chapter Three
Prenatal Development, Birth, and the Newborn Baby
16
Psychology
Undergraduate 3
09/30/2007

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Cards

Term
implantation
Definition
between the 7th and 9th days after fertilization when the blastocyst burrows deep into the unterine lining
Term
amnion
Definition
a membrane formed that encloses the developing organism in amniotic fluid which helps keep the temperature of the prenatal world constant and provides a cushion against any jolts caused by the women's movements.
Term
chorion
Definition
another protective membrane which surrounds the amnion and has tiny hair like villi, or blood vessels.
Term
Placenta
Definition
an object that brings the embryo's and the mother's blood close together but prevents them from mixing directly providing food and oxygen to reach the organism and waste products to be carried away.
Term
umbilical cord
Definition
contains one large vein which delivers blood loaded with nutrients, and two arteries, which remove waste products.
Term
Embryo
Definition
The stage from implantation through the eighth week of pregnancy in which the groundwork is laid for all body structures and organs.
Term
Neural Tube
Definition
when the ectoderm folds over and becomes the spinal cord and brain.
Term
Fetus
Definition
the stage from the 9th month to the end of pregnancy, the longest prenatal period.
Term
Trimesters
Definition
a period of time in which prenatal development is divided into.
Term
Vernix
Definition
a white cheeselike substance that protects its skin from chapping during the long months spent bathing in the amniotic fluid.
Term
Lanugo
Definition
White, downy hair that appears over the entire body, helping the vernix stick to the body.
Term
age of viability
Definition
the point at which the fetus can first survive. Occurs somewhere between 22 and 26 weeks.
Term
Teratogen
Definition
refers to any enviromental agent that causes damage during the prenatal period
Term
Fetal Alcohol Syndrome
Definition
Mental retardation; impaired motor coordination, attention, memory, and language; and overactivity are typical of children with the disorder.
Term
Fetal Alcohol Effects (FAE)
Definition
seen in children of mothers who generally drank alcohol is mall quanities, affected individuals display only some abnormalities.
Term
Rh factor incompatibility
Definition
When the mother is Rh negative and the father is Rh positive the baby may inherit the father's Rh positive blood type.
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