Extraembryonic Coelom, Exocoelom

The extraembryonic coelom and exocoelom are two different cavities that surround the embryo in the earliest stages of its development and are closely related to each other.

The Extraembryonic Coelum is a cavity lined with mesoderm that surrounds the embryo from its earliest stages. The coelomic cavity (coelom) develops from the mesoderm, which is located between the notochord and somites of the embryo. It is part of the coelomic system, which plays an important role in the development of the embryo, as it ensures the exchange of substances between various tissues and organs of the embryo and the environment.

Exocoelom is a temporary cavity that temporarily communicates with the coelomic cavity and is located outside the embryo. At the beginning of pregnancy, the exocelom is a fluid-filled space that surrounds the embryo and provides it with nutrition and protection from external influences. It is temporarily connected to the coelomic cavity through openings that form during the early stages of embryonic development.

In late pregnancy, when the embryo begins to grow, the exocele becomes less noticeable and is almost completely obliterated. This occurs due to the growth of the amnion, the membrane that covers the embryo. The amnion fuses with the chorion - the outer membrane of the embryo - and forms the amniotic cavity, which provides the embryo with protection and nutrition throughout pregnancy.

Thus, in general, the extracoel and exocoel are important components of embryo development in the early stages of pregnancy. They play an important role in the metabolism between the embryo and the environment, and also provide the embryo with reliable protection and nutrition.

The extrauterine coelom (Extraembryonic coelom) or exocoelum is a cavity lined with mesodermal cells surrounding the embryo at the earliest stages of its development. It communicates temporarily with the intrauterine coelomic cavity (abdominal cavity) and is almost completely obstructed (blocked) in the later stages of pregnancy due to the growth of the amnion.

The exocoelome develops from the coelom, which in turn is formed from the mesoderm, which passes through the body of the embryo and forms the coelomic sacs. These bags are subsequently connected to each other and form the coelomic cavity, which is part of the intrauterine coelom.

During the early stages of development, the exocoelom plays an important role in the development of the embryo, as it serves to protect and support embryonic tissues and organs. In addition, it is also involved in the formation of coelomic sacs, which subsequently become part of the peritoneal cavity, pleural cavity, pericardium and testicular serosa.

However, once the embryo begins to grow, the exocoelomal cavity closes almost completely due to the growing amnion and chorion. In the later stages of pregnancy, the exocoelum is almost completely obturated, which allows the amnion to merge with the chorion and protect the embryo from external influences.

Extraembryonic Coelom, Exocoelom - a cavity lined with mesoderm that surrounds the embryo, starting from the earliest stages of its development. The exocoelom temporarily communicates with the coelomic cavity located inside the embryo (the peritoneal cavity). In later stages of pregnancy, it is almost completely obliterated due to the growth of the amnion, which merges with the chorion.

Coelom The extraembryonic, also known as the exocoelom, is a secondary cavity that forms during embryonic development between the outer embryonic layer (ectoderm) and the inner embryonic layer (endoderm). Mesodermal cells form the walls of this cavity, which surrounds the embryo and plays an important role in its development and protection.

Overall, the extraembryonics performs several functions in the development of the embryo. First, it provides space for the embryo and its organs to move freely inside the egg. This is especially important for embryos that develop in eggs with a lot of reserve food, such as bird eggs. The whole provides enough space for the growth and development of the embryo, allowing the organs to develop and function independently of each other.

In addition, the whole extraembryonics plays an important role in the exchange of nutrients and wastes between the embryo and the environment. Through the walls of the coelom, oxygen and nutrients are transferred from the egg to the embryo, as well as metabolic waste is removed. This provides optimal conditions for the growth and development of the embryo.

At later stages of development, the extraembryonic coelom almost completely disappears in mammals. This occurs as a result of the growth of the amnion, which is the second inner membrane surrounding the embryo. The amnion fuses with the chorion to form the amniotic cavity, which surrounds the embryo and is filled with amniotic fluid. The amniotic cavity performs functions previously performed by the extraembryonic coelom and provides protection and optimal conditions for the development of the embryo.

During the development of the embryo, various cavities of the adult organism are formed from the extraembryonic coelom. The peritoneal cavity, pleural cavities, pericardial cavity and serous cavities of the testis develop from the mesodermal cells that line the coelom extraembryonicus. These cavities play an important role in the functioning and protection of the internal organs of the adult body.

In conclusion, the extraembryonic coelom, or exocoelom, is a cavity lined with mesoderm that surrounds the embryo during the early stages of its development. It provides space for the embryo to grow and develop and also plays a role in the exchange of nutrients and waste. However, at later stages of development it disappears, being replaced by the amniotic cavity. From the extraembryonic coelom various cavities of the adult organism are formed, which perform important functions in its life.