Trophoblast

The trophoblast is one of the main layers that form the placenta in mammals. It is formed from the outer cell layer of the embryo, called the blastocyst.

The trophoblast performs several important functions during pregnancy. Firstly, it helps anchor the embryo in the wall of the uterus. Secondly, it participates in the formation of the placenta, which provides nutrition and oxygen exchange between mother and fetus. The trophoblast also secretes hormones that help maintain pregnancy.

During placental development, the trophoblast differentiates into several cell types. For example, syncytiotrophoblast are multinucleated cells that are formed by the fusion of many small trophoblast cells. They provide contact between mother and fetus and are involved in the absorption of nutrients from maternal blood. Another type of trophoblast cell, the cytotrophoblast, is responsible for the growth and division of the placenta.

In general, the trophoblast is an important layer that ensures the normal development of the embryo and fetus during pregnancy. Its functions include securing the embryo in the uterus, forming the placenta, and secreting hormones necessary to maintain pregnancy. Different types of trophoblast cells have different functions, allowing them to work together to provide optimal conditions for fetal growth and development.

**Trophoblast** (from the Greek trofo, meaning "nourishment", and blasto, or blasmos, meaning "embryo", which describes its role in the formation of the fertilized egg during pregnancy) is a tissue from a group of germ layer cells that forms a significant part of the chorion during the early stages of embryo development. In response to a stimulus, a trophoblastic impulse gives rise to trophoblast hyperplasia. After fertilization, trophoblasts invade other tissues and form a new organ, namely the yolk sac, which will appear after a certain time.

It is worth noting the fact that the role of the trophoblast in mammals (i.e.