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Question
Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
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Solution
The correct option is D Amnion
In human beings, the embryo during its initial developmental stages is termed the blastocyst and is composed of an outer envelope
of cells (trophoblast or trophoectoderm) and inner cell mass (embryoblast). The cells of the trophoblast give rise to a mass of mesodermic cells that forms the extra embryonic mesoderm, which can be differentiated int two layers. Moreover, two more embryonic membranes, the chorion and amnion are formed. While the chorion becomes the main embryonic part of the placenta, the amnion surrounds the embryo and creates an amniotic cavity that is filled with amniotic fluid, which helps prevent desiccation of the embryo.
In human beings, the embryo during its initial developmental stages is termed the blastocyst and is composed of an outer envelope of cells (trophoblast or trophoectoderm) and inner cell mass (embryoblast). The cells of the trophoblast give rise to a mass of mesodermic cells that forms the extra embryonic mesoderm, which can be differentiated int two layers. Moreover, two more embryonic membranes, the chorion and amnion are formed. While the chorion becomes the main embryonic part of the placenta, the amnion surrounds the embryo and creates an amniotic cavity that is filled with amniotic fluid, which helps prevent desiccation of the embryo.
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