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Connective tissue
Type of biological tissue in animals / From Wikipedia, the free encyclopedia
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Connective tissue is one of the four primary types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue.[1] It develops from the mesenchyme, derived from the mesoderm, the middle embryonic germ layer.[2] Connective tissue is found in between other tissues everywhere in the body, including the nervous system. The three meninges, membranes that envelop the brain and spinal cord, are composed of connective tissue. Most types of connective tissue consists of three main components: elastic and collagen fibers, ground substance, and cells.[2] Blood, and lymph are classed as specialized fluid connective tissues that do not contain fiber.[2][3] All are immersed in the body water. The cells of connective tissue include fibroblasts, adipocytes, macrophages, mast cells and leucocytes.
| Connective tissue | |
|---|---|
Section of epididymis. Connective tissue (blue) is seen supporting the epithelium (purple) | |
| Identifiers | |
| MeSH | D003238 |
| FMA | 96404 |
| Anatomical terminology | |
The term "connective tissue" (in German, Bindegewebe) was introduced in 1830 by Johannes Peter Müller. The tissue was already recognized as a distinct class in the 18th century.[4][5]