Somite, Dorsal Segment (Somite)

Somite, Dorsal Segment (Somite): Description and Development

Somite, Dorsal Segment (Somite) is a paired segmented area of ​​the dorsal part of the mesoderm, which is located on the sides of the notochord at an early stage of embryonic development. Somites are an important element in the formation of many organs and tissues, including skeletal muscle tissue and skin.

Each somite contains three main parts: sclerotome, myotome and dermatome. The sclerotome is located in the medial part of the somite and is a source for the development of bones and cartilage of the skeleton. The myotome is located in the lateral part of the somite and forms striated skeletal muscles. The dermatome is located externally and is the source for skin development.

Somite development begins early in embryonic development, when the mesoderm begins to segment and form paired blocks on either side of the neural tube. Each block is then divided into a pair of somites, creating a transversely segmented arrangement. The somites continue to develop and differentiate during the subsequent weeks and months of embryonic development.

Somites play an important role in the formation of many organs and tissues in the developing embryo. For example, the sclerotome is the source for the development of bones and cartilage in the skeleton, including the spine, ribs, and rib cage. The myotome forms striated skeletal muscles that provide movement and support to the body. The dermatome is the source for the development of the skin and the associated nervous and circulatory systems.

In conclusion, the somite, a dorsal segment (Somite), is an important element of embryonic development, which is the source for the development of many organs and tissues, including skeletal muscle tissue and skin. Somite development occurs early in embryonic development and continues over subsequent weeks and months. The study of somites and their role in the development of the organism can help in understanding various diseases and pathologies associated with embryo development.

A somite (dorsal segment) is a paired segmented section of the dorsal part of the mesoderm. It is located on the sides of the notochordal column in the early stages of embryonic development and is an important element for the formation of the skeleton.

The somite consists of three main parts:

1. Sclerotomes: They are located in the center of the somite and are responsible for the development of bones and cartilage of the skeleton. They give rise to the development of long bones, cartilaginous sections and other skeletal elements.
2. Myotomes: These areas are located on the sides of the sclerotomes and form muscles. They are responsible for the formation of striated skeletal muscles.
3. Dermatomes: Dermomes are found on the outer side of the somite and are the source of skin. They provide protection to the body from external influences.

Thus, the somite is an important organ for the development of the skeleton and muscles. It also plays a role in skin formation and provides early protection to the body.

Somite - dorsal segment. These are paired segmented sections of the dorsal mederma - formed at an early stage of embryo development. It may differ into the following sections: - Sclerotoma. This is the name of the central, largest part. Here the spine and other bones appear, as well as their cells - chondrocytes and osteoblasts. Sclerotomes are constantly dividing, due to which the common tail is divided into separate parts. However, they do not coincide with other fragments, as they grow at a faster pace. - Myotoma. On the side there are myocytes - striated muscles. They appeared in connection with the appearance of muscles. Each muscle is associated with a specific segment - a part of the brain that requires muscle coordination to maintain balance. Myotomes increase in size with the help of mesoderm tissue when the main cervical vertebrae first appear. Muscles continue to develop as the skull and spine develop. - Mesoderm. Towards the end of pregnancy, the mesoderm develops. Its main tissues include nephroglia, which holds excrement, mucus and bone, skin, blood marrow, muscle and bones, mainly the skeleton. From this tissue appears almost