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7 Cards in this Set
- Front
- Back
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Morula
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solid ball of about 16+ cells that enters uterus after 3-4 days in uterine tube
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embryo
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baby called for first 2 months, during first trimester, all organ systems and extraembryonic membranes develop
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First trimester
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baby = embryo for first 2 months, morning sickness may occur
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amnion
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thin membrane that surrounds embryo
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yolk sac
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extraembryonic membrane, non-functional during most of pregnancy, contains nutrients in animals with shelled eggs
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chorion
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outermost membrane, contributes to formation of placenta
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foramen ovale
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opening in fetal interatrial septum, first breath of air causes a flap to cover this opening, fossa ovale in adult
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