EMBRYOLOGY
PLACENTA FETAL MEMBRANES BIRTH DEFECTS AND TWINING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The placenta, one of the main structures involved in the process of embryonic development, appears early, establishing maternal-fetal relationships until birth. Based on the text, mark the correct alternatives.
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The transport of oxygen and carbon dioxide across the placenta is by simple diffusion.
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Maternal and fetal blood mix in the chorionic villi of the placenta.
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The placenta is a structure of mixed origin, with a fetal and a maternal component.
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The rubella virus can cross the placenta and cause birth defects in the fetus.
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Explanation:
Detailed explanation-1: -This process, called implantation, is completed by day 9 or 10. The wall of the blastocyst is one cell thick except in one area, where it is three to four cells thick. The inner cells in the thickened area develop into the embryo, and the outer cells burrow into the wall of the uterus and develop into the placenta.
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