Prenatal Development

8-10 days, zygote, feritilization, and implantation, amnion forms, placenta forms

a thing, tough, transparent membrane that holds the amniotic fluid, and surrounds the embryo

an organ that is made up of tissue from both the mother and the fetus that serves as a barrier and a filter btwn their bloodstream, umbilical chord is attached

a flexible helical structure containing blood vessels that connects the developing organism to the placenta

totipotent cells-any cell can become anything (stem cells), specialization multipotent cells- the cell transforms to the surrounding cells

2-8 weeks , embryo, forming major systems, a sensitive period (harmful to environmental factors), neural tube at 26 days (spine +brain become nervous system), 6 weeks arm buds and eyes form, takes cephalocaudal trend

from head to tail growth

9th week til birth, fetus, all basic tissues are formed, fetus grows rapidly in size, age of viability

abnormalities from environmental factors that harm the normal development of the baby determined by dose, heredity, sum total, and timing.

spontaneous abortion, low birth weight ( messes with placenta and nutritent flow)

Deprives fetus of oxygen and nutrition, low birth weight, associated with SIDS ( sudden infant death syndrome w/in 1st 3 months)

3 drinks or more on a single occasion, affects physical and mental development, FAS ( fetal alcohol syndrome): mentally retarded, poor motor/attention/memory, lang deficits, overactivity, slow physical growth.

at 7months or 28 weeks, to live outside the womb, digestive and respiratory systems working, born 1.5lbs able to survive

Salk: study of newborns, heart beating, and weight gain, found:infants react positively to stimuli similar to those in prenatal stages

Mothers read a story during pregnancy to fetus, tested newborsn 2/3 days old, read old and new story, prefered old story, and sucking rate went with diction of words