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17 Cards in this Set
- Front
- Back
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Germinal Period
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0-2 Weeks, blastocyst forms
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Embryonic Period
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3-8 weeks
major organs develop |
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Fetal Period
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9 weeks to birth
organ system functionin |
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zygote
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divides many times through mitosis to form the blastocyst
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morula
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a mass of 16 cells that itravels down the fallopian tube to the uterus.
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blastocyst
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a hollow ball of 150 cells that implants tendrils in the uterus around day six
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cephalocaudal development
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head to tail development
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proximidistal development
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center outward development
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age of viability
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beginning of 7th month (about
24 weeks) when survival outside the uterus is possible. |
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Teratogen
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any disease or drug tor other environmental agent that can harm a developing etus
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Critical/Sensitive Period
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the effects of a teratogenic agent are worst during thw critical period when an organ system grows most rapidly
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effects of alcohol
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small head, facial abnormalities, heart defects, low birthweight, fetal alcohol syndrome
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effects of smoking
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small premature baby with respiratory symptoms
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effects of poor nutrition
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stunts prenatal growth, causes under weight babies and can damage Central Nervous System development
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anoxia
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oxygen shortage
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benefits of breast feeding
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?
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effects of stress
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growth; irritability
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