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10 Cards in this Set
- Front
- Back
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4 week
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4-12 somites, pharnyngeal arches are made, neural tube is somwhat open and of course the head and tail folds begin.
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5 week
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head continues its growth, 2nd pharyngeal arch grows the fastest.
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6 week
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hand plates begin, head is much larger relative to the trunk. reflexes begin to form.
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7 week
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ossification of the bones have begun
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Using ultrasound examination
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Transvag sonograph premits earlier and more accurate detemination. Crown rump measurements indicate how old the spefimen is
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turners syndrome
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short stature, webbed feet, absense of sexual maturation.
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Cells/structures developing from the ectoderm, which forms the neuroectoderm
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neural crest, neural tube
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Nueral Crest
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cranial and sensory ganglia, pharyngeal arches,
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Neural Tube
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Central Nervous system, retina, pineal body and posterior part of the pituitary
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formation of zygote
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14 days after LNMP ( so gestation age is subtracted by 14 , to answer the age of the embryo.
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