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11 Cards in this Set
- Front
- Back
Define Chorion
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an extra-embryonic membrane that, in early development, forms the outer wall of the blastocyst; from it develop the chorionic villi, which establish an intimate connection with the endometrium, giving rise to the placenta
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Define Chorion frondosum:
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the outer surface of the chorion whose villi contact the decidua basalis; the placental portion of the chorion.
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Define Chorion laeve:
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the smooth, nonvillous portion of the chorion.
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Define Sycytiotrophoblast:
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outer layer of cells covering the chrionic villi of the placenta that are in contact with the maternal blood or decicua.
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Define Cytotrophoblast:
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thin inner layer of the trophoblast composed of cuboidal cell.
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Define Decidua capsularias:
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the part of the decidua that surrounds the chorionic sac
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Define Decidua basalis:
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the part of the uterine decidua that unites with the chorion to form the placenta
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Define Decidua parientalis (vera):
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the endometrium during pregnancy except at teh site of the implanted blastocyst.
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Define Amnion:
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the innermost fetal membrane; a thin, transparent sac that holds the fetus suspended in the liquor amnii or amniotic fluid; it grows rapidly at the expense of the extraembyrionic coelom, and by the end of the third month if fuses with the chorion, forming the amniochrionic sac, commonly called the bag of waters.
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What function does the placenta serve?
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serves as fetal lungs, liver, and kidneys until birth while growing and maintaining the conceptus in a balanced, healthful environment.
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Name the anatomy of the placenta:
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1. Trophoblasts
2. Chorionic villi 3. Intervillous spaces 4. Chorion 5. Amnion 6. Decidual plate |