Placental development, umbilical cord structures, amnion and chorion, and twinning types tested on USMLE Step 1.
About this set
35 basic cards for USMLE Step 1 Embryology. Set 10 of 11 in USMLE Embryology. It opens with "Which trophoblast layer is the inner, mononuclear, mitotically active layer?" and "Which trophoblast layer is the outer, invasive, multinucleated layer?". Study it alongside the other USMLE Step 1 sets below.
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- Which trophoblast layer is the inner, mononuclear, mitotically active layer?
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Cytotrophoblast- Which trophoblast layer is the outer, invasive, multinucleated layer?
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Syncytiotrophoblast- Which trophoblast layer secretes hCG?
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Syncytiotrophoblast- The cytotrophoblast gives rise to which other trophoblast layer?
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Syncytiotrophoblast- What is the maternal (decidual) component of the placenta called?
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Decidua basalis- What is the decidua that covers the implanted conceptus, facing the uterine lumen, called?
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Decidua capsularis- What is the decidua lining the rest of the uterine cavity, away from the implantation site, called?
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Decidua parietalis- Fusion of the decidua capsularis with the decidua parietalis obliterates what space?
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The uterine cavity (uterine lumen)- What is the villous portion of the chorion that forms the fetal part of the placenta called?
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Chorion frondosum- What is the smooth, villus-free portion of the chorion called?
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Chorion laeve- What villi anchor the placenta to the decidua basalis?
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Anchoring (cytotrophoblastic) villi- The ____ carries oxygenated blood from the placenta to the fetus.
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umbilical vein- The ____ carry deoxygenated blood from the fetus to the placenta.
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umbilical arteries- What gelatinous connective tissue surrounds and protects the umbilical vessels?
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Wharton's jelly- How many vessels does a normal umbilical cord contain?
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Three (two arteries and one vein)
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