Ectomesenchyme


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Ectomesenchyme

 

part of the embryonic connective tissue (mesenchyme) of most multicellular animals and humans. The ectomesenchyme consists of cells of the ectoderm. Almost the entire visceral skeleton, including auditory ossicles and branchial arches, as well as pigment cells and the connective tissue layer of skin, all develop from the ectomesenchyme.

References in periodicals archive ?
Ameloblastic fibroma is a rare, mixed odontogenic tumor composed of dental papilla-like odontogenic ectomesenchyme and odontogenic epithelium.
MSX1 is a member of the homeobox genes and it is expressed in regions of condensing ectomesenchyme in the tooth germ [61].
The aggressive clinical behavior and high recurrence rate of KOTs suggest a true neoplastic potential, which led the World Health Organization in 2005 to classify them as benign tumors containing an odontogenic epithelium with a mature and fibrous stroma and no odontogenic ectomesenchyme. (1)
Tooth development In utero, ectomesenchyme from the neural crest cells migrates to the site of tooth development and forms a complex signaling network with the dental epithelium from the first branchial arch.