What does mesenchyme

Mesenchyme

Synonym: embryonic connective tissue
English: mesenchymes

1 definition

The Mesenchyme is pluripotent filling and supporting tissue developed in the embryonic period. It essentially emerges from the mesoderm.

2 background

The terms "mesenchyme" and "mesoderm" are not congruent. Mesenchyme refers to a certain histological tissue type, mesoderm a stem cell cluster (germ layer) that arises during embryogenesis.

3 embryology

In embryology, a distinction is made between the intraembryonic mesenchyme, which serves as the origin for other types of tissue, and the extraembryonic mesenchyme, which serves as a supporting tissue for the covering of the fruit of the abdomen.

The mesenchyme can be detected in the human embryo from the 3rd week of development. It arises from the various cotyledons of the embryo, primarily from the mesoderm, but to a lesser extent also from the ectoderm and the endoderm.

4 differentiation

Various tissues of the body arise from the mesenchyme, including:

Organs such as the spleen are also largely made up of mesenchyme.

5 structure

The mesenchyme is made up of star-shaped, branched cells that are spatially connected to one another via processes and nexus. There is a very loose intercellular substance between the cells. Many mitoses occur in the mesenchyme as an expression of rapid growth. In contrast to the epithelium, mesemchymal cells have little or no cell polarity.