Germinal Disc

The embryonic disc (discus embryonicus, lne) is a structure that forms in the early stages of embryonic development in oviparous animals. The germinal disc is a thickening of cells at one of the poles of the embryo, from which the tissues and organs of the embryo subsequently develop.

The germinal disc is also called blastodisc, discoblastula, germinal shield or embryonic disc. It is formed at the blastula stage as a result of the redistribution of cells over the surface of the embryo. Gastrulation occurs on the germinal disc - the formation of a two-layer embryo. From the cells of the germinal disc, ectoderm, mesoderm and endoderm subsequently develop.

Thus, the germinal disc plays a key role in the processes of cleavage, gastrulation and organogenesis, forming the basis of the future organism from a single-layer embryo in the early stages of development.

The germinal disc (Discus Embryonicus, LNE) is a germinal disc that appears in the early stages of embryonic development. It is composed of cells that form an outer layer of cells called the epibolum.

The germinal disc is an important stage in the development of the embryo, as it ensures the formation of the main body structures and organs. During the development of the germ disc, the cells of the epibolum begin to differentiate to form different cell types.

In the future, these cells will be used to form various organs and tissues, including skin, muscles, bones and the nervous system.

It is important to note that the germinal disc plays an important role in the process of implantation of the embryo into the uterus. It provides contact between the embryo and the wall of the uterus, allowing it to begin to develop inside the uterus.

Thus, the germinal disc is a key stage in the development of the embryo and plays an important role in the formation of the main structures and organs of the body.