Definition, Betydelse & Synonymer | Engelska ordet MESENCHYME

Definition av MESENCHYME

1. (anatomi) mesenkym

Exempel på hur man kan använda MESENCHYME i en mening

• It is sometimes defined by what it is not – such as "nonepithelial, extraskeletal mesenchyme exclusive of the reticuloendothelial system and glia".
• During this time, primordial germ cells migrate from the yolk sac to the genital ridge; a region of mesenchyme arising from, and running parallel with, the mesonephros.
• The yolk sac is situated on the front (ventral) part of the embryo; it is lined by extra-embryonic endoderm, outside of which is a layer of extra-embryonic mesenchyme, derived from the epiblast.
• As primary mesenchyme cells detach from the vegetal pole in the gastrula and enter the fluid-filled cavity in the center (the blastocoel), the remaining cells at the vegetal pole flatten to form a vegetal plate.
• Mesenchymal stem cells within mesenchyme or the medullary cavity of a bone fracture initiate the process of intramembranous ossification.
• The ciliary muscle develops from mesenchyme within the choroid and is considered a cranial neural crest derivative.
• There are two processes resulting in the formation of normal, healthy bone tissue: Intramembranous ossification is the direct laying down of bone into the primitive connective tissue (mesenchyme), while endochondral ossification involves cartilage as a precursor.
• During fetal development vascular lens capsule (tunica vasculosa lentis) develops from the mesenchyme that surrounds the lens.
• The paired gubernacula (from Ancient Greek κυβερνάω = pilot, steer), also called the caudal genital ligament, are embryonic structures which begin as undifferentiated mesenchyme attaching to the caudal end of the gonads (testicles in males and ovaries in females).
• The septum transversum is a thick mass of cranial mesenchyme, formed in the embryo, that gives rise to parts of the thoracic diaphragm and the ventral mesentery of the foregut in the developed human being and other mammals.
• Chondrification (also known as chondrogenesis) is the process by which cartilage is formed from condensed mesenchyme tissue, which differentiates into chondrocytes and begins secreting the molecules that form the extracellular matrix.
• The anterolateral portion (squama) arises from the mesenchyme at 8 weeks of embryogenesis while the petromastoid portion develops later from a cartilaginous center at 6 months of fetal development.
• The cells of the pronephric duct migrate caudally whilst inducing adjacent mesenchyme to form the tubules of the initial kidney-like structure called the pronephros.
• The metanephrogenic blastema or metanephric blastema (or metanephric mesenchyme, or metanephric mesoderm) is one of the two embryological structures that give rise to the kidney, the other being the ureteric bud.
• The lateral plate mesoderm will split into two layers, the somatopleuric mesenchyme, and the splanchnopleuric mesenchyme.
• In this area, the dermis is derived from cells of mesenchymal cells: the mesenchyme is derived from the sclerotome and splanchnopleura located in the nearby regions of the torso.
• The first emergence of mesenchyme occurs during gastrulation from the epithelial–mesenchymal transition (EMT) process.
• The two sides of the lamina do not fuse in the midline but remain separated by a thin septum of mesenchyme that will create the preputial frenulum.
• For the molecular mechanism of β-catenin and the micromeres, it was observed that Notch was present uniformly on the apical surface of the early blastula but was lost in the secondary mesenchyme cells (SMCs) during late blastula and enriched in the presumptive endodermal cells in late blastula.
• The mesohyl includes a noncellular colloidal mesoglea with embedded collagen fibers, spicules and various cells, being as such a type of mesenchyme.

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