A layer of cells that develop over the surface of the blastocyst and help in the ovum’s adherence to the uterine wall plus other cells eventually form the placenta trophoblastic cells.
Tissue which forms the wall of a blastocyst.
The tissue that forms the wall of the blastocyst. At implantation it forms two layers, an inner cellular layer (cytotrophoblast) and an outer syncytial layer (plasmidotrophoblast), which forms the outermost layer of the placenta and attains direct contact with the maternal bloodstream.
The outer layer of the fertilized ovum which attaches the ovum to the wall of the uterus (or womb) and supplies nutrition to the embryo.
The outermost layer of the developing blastocyst (blastodermic vesicle) of a mammal. It differentiates into two layers, the cytotrophoblast and syntrophoblast, the latter coming into intimate relationship with the uterine endometrium, with which it establishes nutrient relationships.
The tissues encompassing an embryo that secure its attachment to the uterus.
The outer layer of tissue surrounding the blastocyst, known as extraembryonic ectoderm, plays a crucial role in early development. It facilitates the attachment of the ovum to the uterine wall’s endometrium and provides essential nutrients to the developing embryo. This layer is the origin of both the chorion and the amnion.