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| Mesenchyme | ||
|---|---|---|
| Latin | mesenchyma | |
| Carnegie stage | 6b | |
| Precursor | primarily mesoderm | |
| Dorlands/Elsevier | m_10/12526276 | |
Mesenchyme refers to loosely organized connective tissue present in the embryo regardless of origin.[1] Viscous in consistency, mesenchyme contains collagen bundles and fibroblasts. Mesenchyme later differentiates into blood vessels, blood-related organs, and connective tissues.citation needed
Embryonic connective tissue (mesenchyme):
- Consists of loosely-packed, unspecialized cells set in a gelatinous extracellular matrix
- Develops into other types of tissues: connective, bone, cartilage
- Develops into other types of structures and systems: blood cells, endothelial cells, smooth muscle cells, circulatory system, lymphatic system.
All organs in the body contain mesenchyme.
Contents |
Ectomesenchyme
Ectomesenchyme has similar properties to mesenchyme. The major difference is that ectomesenchyme is usually considered to arise from neural crest cells,[2] which are a critical group of cells that form in the cranial region during early vertebrate development. Thus, ectomesenchyme plays a critical role in the formation of the hard and soft tissues of the head and neck such as bones, muscles and most importantly the branchial arches.
See also
- Mesenchymal stem cell
- Mesohyl, the gelatinous matrix in sponges, was formerly also called mesenchyme
References
- ^ Sadler, T.W. (2006). Langman's Medical Embryology. Lippincott Williams & Wilkins, pp. 68-70. ISBN 0-7817-9485-4.
- ^ Weston JA, Yoshida H, Robinson V, Nishikawa S, Fraser ST, Nishikawa S (2004). "Neural crest and the origin of ectomesenchyme: neural fold heterogeneity suggests an alternative hypothesis". Dev. Dyn. 229 (1): 118–30. doi:. PMID 14699583.
External links
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- This page was last modified on 23 September 2008, at 20:40.
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