WebJan 17, 2024 · They are formed during the first stage of pregnancy and are the first cells to differentiate from the fertilized egg. This layer of trophoblasts is also collectively referred to as the trophoblast, or, after gastrulation, the trophectoderm, as it is then contiguous with the ectoderm of the embryo. Trophoblast Function WebThe chorion frondosum ultimately develops into the placenta. The mature placenta consists of the wall of the chorion (the chorionic plate) and numerous villi protruding from it. The fetal surface of the placenta is smooth and shiny because of …

The Placenta (Chapter 55) Flashcards Quizlet

WebThe zygote develops by mitosis, and when it has developed into a compacted ball of 8-16 cells becomes known as the morula. Until this stage in development, all cells ( blastomeres) are autonomous and not specified to any particular subsequent functional development. WebThe 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 a … jerry instagram

27.3A: Trophoblast Development - Medicine LibreTexts

WebThey provide nutrients to the embryo and develop into a large part of the placenta. They form during the first stage of pregnancy and are the first cells to differentiate from the … WebApr 12, 2024 · Introduction. The human placenta is a transient organ physically linking the developing fetus to the mother during pregnancy. The placenta safeguards the pregnancy and the long-term health of both mother and fetus by performing multiple functions, including facilitating the exchange of nutrients and oxygen, immunologic tolerance, and protecting … Webchorion, also called Serosa, in reptiles, birds, and mammals, the outermost membrane around the embryo. It develops from an outer fold on the surface of the yolk sac. In … jerry images