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16 Cards in this Set
- Front
- Back
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what gives rise to the germ layers that form all the tissues and organs of embryo? |
embryonic disc (TRILAMINAR disc) |
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It is the process through whichthe Bilaminar embryonic disc ischanged into a Trilaminar disc |
gastrulation (intraembryonic mesoderm)appears between the ectodermand endoderm.) |
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where and when does the primitive streak appear? |
at the beginning of gastrulation, in the caudal part of epiblast. |
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what is the future site of the cranial end of the embryo? |
prechordal plate (hypoblast) |
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is mesoderm present in the prechordal plate? |
no |
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temporary axialskeleton for theembryo. |
notochord |
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the functional layer of the endometriumduring pregnancywhich is shed after parturition |
Decidua(GravidEndometrium) |
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what forms the chronic villi? |
cytotrophoblast extends into the syncytotrophoblast |
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which surface of the placenta is smooth and covered with the amnion? |
fetal surface (villous chorion) |
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in the fetal placental circulation how many umbilical arteries are there? and what passes through it? |
2 umbilical arteries carry poorly oxygenated blood from fetus to placenta |
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what does the chronic villi contain? |
antrio-capillary venous network |
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the placental membrane is composed of 4 layers, they are: |
1- Syncytiotrophoblast 2- Cytotrophoblast 3- CT of villus 4- Endothelium of fetal capillaries (20 weeks) at full term it becomes thinner without the cytotrophoblast (Vasculosyncytialplacental membrane) |
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analgesics |
pain killers |
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amniotic fluid derived from maternal tissue is through: |
1- diffusion across amniochorionic membrane (placenta) 2-diffusion across chorionic plate (intervillous spaces) |
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meconium |
fetal feces & urine |
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amniocentesis |
the sampling of amniotic fluid |
