OBJECTIVE LIFE SCIENCE
DEVELOPMENTAL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The trophoblast tissue of chick embryo does not have any role in its nourishment.
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TRUE
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FALSE
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The cells that form the outer shell are called trophoblasts (trophe = “to feed” or “to nourish”). These cells will develop into the chorionic sac and the fetal portion of the placenta (the organ of nutrient, waste, and gas exchange between mother and the developing offspring).
Detailed explanation-2: -The blastocyst forms after the blastomeres undergo compaction. It contains outer cells-the trophoblast cells-that become the chorion, and an inner cell mass that becomes the amnion and the embryo.
Detailed explanation-3: -The chorionic villi of the chorion extend into the endometrium to form the fetal portion of the placenta.
There is 1 question to complete.