Mesenchyme

Mesenchyme is a type of connective tissue found in animals. It is composed of loosely associated cells that can migrate easily within the body. Mesenchyme is particularly important during the development of an organism, as it gives rise to many different types of tissues and organs.

Origin

Mesenchyme originates from the mesoderm, one of the three primary germ layers in the early embryo. The other two germ layers are the ectoderm and endoderm. Mesenchyme can also be derived from the neural crest, a structure that forms along the dorsal midline of the neural tube.

Function

The primary function of mesenchyme is to provide a flexible, loose matrix in which cells can migrate and interact during development. It also provides a source of undifferentiated cells that can differentiate into various cell types, including fibroblasts, osteoblasts, chondroblasts, and myoblasts. These cells are responsible for the formation of connective tissue, bone, cartilage, and muscle, respectively.

Clinical significance

Abnormalities in mesenchyme development can lead to a variety of congenital disorders, including birth defects affecting the heart, lungs, and skeletal system. For example, Marfan syndrome is caused by a mutation in a gene that codes for a protein found in the extracellular matrix of mesenchymal cells.

See also

• Mesoderm
• Neural crest
• Connective tissue
• Marfan syndrome

References

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