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22 Cards in this Set
- Front
- Back
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This germ layer is the upper layer of the embryonic disk |
Ectoderm |
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Germ layer is the middle layer |
Mesoderm |
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Germ layer is the lower layer & forms roof of yolk sac |
Endoderm |
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Germ layer that gives rise to: epithelium lining of the respiratory & digestive tracts |
Endoderm |
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Germ layer that gives rise to the oropharynx, liver, pancreas, urethra, bladder & vagina? |
Endoderm |
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The germ layer that gives developes into: Bones, teeth, muscles |
Mesoderm |
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Germ layer that develops into; Dermis and connective tissue |
Mesoderm |
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Germ layer that develops into: Cardiovascular system, spleen & urogenital system |
Mesoderm |
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Germ layer that gives rise to: -epidermis -glands (anterior pituitary, cutaneous & mammary) -nails -hair |
Ectoderm |
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Germ layer that gives rise to: -CNS -PNS -lens of eyes -tooth enamel -floor of amniotic sac |
Ectoderm |
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Stage 15 days - 8 weeks after conception |
Embryo |
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9+ weeks after conception |
Fetus |
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Conception - 14 days |
Zygote |
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Week the fetus begins urinating into the amniotic fluid |
11 weeks |
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Purposes of amniotic fluid |
-helps maintain constant body temperature -source of oral fluid -repository for waste -fluid & electrolyte homeostasis -cushions fetus from outside trauma(blunts & disperses outside forces) -freedom for movement (for musculoskeletal development) -keeps embryo from tangling w/membranes to facilitate symmetric growth |
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< 300 mL amniotic fluid |
Oligohydramnios |
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> 2 L amniotic fluid |
hydramnios |
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Oligohydramnios is associated with this abnormality |
Fetal renal abnormalities |
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Hydramnios is responsible for these abnormalities |
Gastrointestinal & others |
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Contents of the amniotic fluid |
-albumin -urea -uric acid -creatinine -lecithin -sphingomyelin -bilirubin -fructose -fat -leukocytes -proteins -epithelial cells -enzymes -lanugo hair |
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Amniocentesis can reveal |
Much info about fetus |
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Genetic studies /karyotyping reveal what about fetus |
-Sex - # of chromosomes -structure of chromosomes |
