The part of the embryonic mesoderm, consisting of loosely packed, unspecialized cells set in a gelatinous ground substance, from which connective tissue, bone, cartilage, and the circulatory and lymphatic systems develop.
mesenchymal mes·en'chy·mal or mes'en·chym'a·tous (-kī'mə-təs) adj.
mesenchyme
Dictionary:
mes·en·chyme (mĕz'ən-kīm', mĕs'-)  |
| 5min Related Video: Ectomesenchymal |
| Dental Dictionary: mesenchyme |
n
An embryonic connective tissue that migrates from the primitive epidermal and hypodermal layers and later produces the mesodermal layer. It is in this layer that embryonic tooth buds begin to form.
| Veterinary Dictionary: mesenchyme |
The meshwork of embryonic connective tissue in the mesoderm, from which are formed the muscular and connective tissues of the body and also the blood vessels and lymph vessels.
| Wikipedia: Mesenchyme |
Mesenchyme, or mesenchymal connective tissue, is an example of reticular connective tissue, a type of loose connective tissue, which is derived from all three germ layers and located within the embryo .[1] Mesenchyme is characterized morphologically by a prominent ground substance matrix containing a loose aggregate of reticular fibrils and unspecialized cells.[2] The cells are capable of developing into connective tissue, bone, cartilage, the lymphatic system, and the circulatory system.[3][4]
Contents |
Ectomesenchyme
Ectomesenchyme has similar properties to mesenchyme. The major difference is that ectomesenchyme is usually considered to arise from neural crest cells,[5] 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
- Intramembranous ossification
- Mesenchymal stem cell
- Mesoderm
- Mesohyl, the gelatinous matrix in sponges, was formerly also called mesenchyme.
References
- ^ Loose connective tissue
- ^ Mesenchymal tissue
- ^ Strum, Judy M.; Gartner, Leslie P.; Hiatt, James L. (2007). Cell biology and histology. Hagerstwon, MD: Lippincott Williams & Wilkins. pp. 83. ISBN 0-7817-8577-4.
- ^ 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.
Bibliography
- Maximow, Alexander A. and William Bloom (1930). Textbook of histology. Philadelphia: W. B. Saunders
External links
| Mesenchyme | |
|---|---|
| Latin | mesenchyma |
| Carnegie stage | 6b |
| Precursor | primarily mesoderm |
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 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved. Read more |
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| Dental Dictionary. Mosby's Dental Dictionary. Copyright © 2004 by Elsevier, Inc. All rights reserved. Read more |
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| Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved. Read more |
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| Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Mesenchyme". Read more |
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