24 Embryo flashcards.doc

Why is this important the trophoblast gives rise to

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Why is this important? The trophoblast gives rise to the CHORION, which have CHORIONIC VILLI that burrow into the uterus. The capillaries within a chorionic villus of the placenta contain blood from the fetus ONLY, not the mother. Therefore, this tissue can be used for genetic testing for birth defects. What condition is when the placenta implants low and covers part of the cervix, so that a C- section must be performed? The placenta can implant anywhere in the uterus. If it implants really low and covers part of the cervix = PLACENTA PREVIA. What are the three primary germ layers, and what do they give rise to? ECTODERM skin and nervous system MESODERM muscles, bones, and blood ENDODERM the GI tract and other organs The anterior part of the neural tube becomes what? The posterior part of the neural tube becomes what? brain spinal cord
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Embryology Flashcards What is the condition where the anterior part of the neural tube does not fuse? What is the condition where the posterior part of the neural tube does not fuse? Dietary lack of what substance tends to cause this? ANENCEPHALY (“without a brain”). - The head ends at the eyebrows, and there is no cerebrum.
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  • Fall '08
  • Harrison,C
  • Embryo

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