During implantation, the blastocyst attaches itself to the uterine wall and begins to invade it.
During implantation, the blastocyst attaches itself to the endometrium lining of the uterus.
The inner cell mass (ICM) is located inside the blastocoel cavity and gives rise to all other tissues of the embryo.
Embryonic induction plays a crucial role in the formation of various tissues and organs during embryonic development.
The blastocyst consists of an outer layer called the trophoblast, which will form the placenta.
Inductive signals in embryonic induction can include growth factors, transcription factors, and signaling molecules that trigger changes in gene expression.
Embryonic induction is the process by which one group of cells influences the development of another group of cells, leading to the differentiation of specialized cell types.
The trophoblast cells differentiate into two layers - an outer layer that forms the chorionic villi and an inner layer that becomes the placenta.
The embryo is surrounded by extraembryonic membranes (amnion, yolk sac, allantoic duct) which are derived from the epiblast and hypoblast.
The amniotic cavity develops as fluid accumulates between the ectodermal and endodermal layers.
The trophoblast cells of the blastocyst secrete enzymes that break down the extracellular matrix (ECM) between them and the endometrial epithelium.
The outer layer of cells surrounding the blastocoel cavity forms the trophoblast.
As the trophoblast cells continue to proliferate, they form a layer called the chorionic villi.
Chorionic villi are finger-like extensions of the trophoblast that penetrate into the maternal blood vessels.
Trophoblast cells are responsible for producing hormones that maintain pregnancy.
In the process of gastrulation, cells from the ectoderm migrate into the interior of the embryo through an opening called the primitive streak.
The trophoblast also plays a role in implantation by secreting enzymes that break down the endometrial tissue.