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The dermatome is the dorsal portion of the paraxial mesoderm somite which gives rise to the skin . In the human embryo, it arises in the third week of embryogenesis. [2] It is formed when a dermomyotome (the remaining part of the somite left when the sclerotome migrates), splits to form the dermatome and the myotome. [2]
Once cells have adopted somite fate they undergo an epithelial-mesenchymal transition and form a new somite. [11] The position of the somite boundary is thought to be controlled by a gradient of FGF or Wnt signalling that moves posteriorly at the rate that the embryo elongates and grows [3], thus coupling somite size to the size of the embryo ...
The first seven somitomeres give rise to the striated muscles of the face, jaws, and throat. [2]The remaining somitomeres, likely driven by periodic expression of the hairy gene, begin expressing adhesion proteins such as N-cadherin and fibronectin, compact, and bud off forming somites.
Many kinds of tissue derive from the segmented paraxial mesoderm by means of the somite. Among these are: the sclerotome, which forms cartilage, the syndetome, which forms tendons, the Myotome, which forms skeletal muscle, the dermatome, which forms the dermis as well as skeletal muscle, and endothelial cells.
A commission proposed a new definition of obesity focused on how excess fat affects the body, rather than assessing body mass index, that could change clinical care. A new definition of obesity ...
What one nurse learned about humanity amidst the Ebola epidemic
The anatomical term myotome which describes the muscles served by a spinal nerve root, is also used in embryology to describe that part of the somite which develops into the muscles. [3] In anatomy the myotome is the motor equivalent of a dermatome .
Smooth Move. A stop at the food court to score a $1.50 hot dog combo or a slice of pepperoni pizza is a Costco shopping trip necessity. It’s a super cheap and filling meal that even the kids ...