Encyclopedia: Trophoblast
Trophoblasts are cells forming the outer layer of a blastocyst, which provide nutrients to the embryo and develop into a large part of the placenta. They are formed during the first stage of pregnancy and are the first cells to differentiate from the fertilized egg. Trophoblasts are invasive, eroding, and metastasizing cells of the placenta. Trophoblasts mediate the implantation of the embryo into the endometrium, but they are never incorporated...
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The endometrium is digested by enzymes released from the?
A. inner cell mass. B. chorionic villi. C. trophoblast. D. blastocoel. E. morula.
A. inner cell mass. B. chorionic villi. C. trophoblast. D. blastocoel. E. morula.
c. Trophoblast
Asked by lam33gb - 29 months ago
In humans, identical twins arrangement?
In humans, identical twins form when embryonic cells become separated. Embryonic cells can separate...
In humans, identical twins form when embryonic cells become separated. Embryonic cells can separate...
a) implantation occurs independently which can occur anywhere in the uterus. The babies will each have their own amnionic sac and umbilical cord. If they implant close enough together,...
Asked by smile - 6 months ago
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