Pars intermedia

Pars intermedia Median sagittal through the hypophysis of an adult monkey. (Pars intermedia labeled at bottom center.) Latin pars intermedia adenohypophyseos Gray's subject #275 1275 Sistema MeSH [1] [[Imagen:|190Px|centro|]] Pars intermedia is the boundary between the anterior and posterior lobes of the pituitary. It contains three types of cells - basophils, chromophobes, and colloid-filled cysts. The cysts are the remainder of Rathke’s pouch. In human fetal life, this area produces melanocyte stimulating hormone or MSH which causes the release of melanin pigment in skin melanocytes (pigment cells). Sin embargo, the pars intermedia is normally either very small or entirely absent in adulthood. In lower vertebrates (pescado, amphibians) MSH from the pars intermedia is responsible for darkening of the skin, often in response to changes in background color. This color change is due to MSH stimulating the dispersion of melanin pigment in dermal (skin) melanophore cells. External links Histology at Boston University 14001loa Histology at Boston University 14101loa Histology at USC end/c_1 Histology at USC end/c_11 Histology at OU 38_11 UIUC Histology Subject 991 Endocrine system - Pituitary gland - edit Posterior pituitary: Pars nervosa | Median eminence | Infundibular stalk Anterior pituitary: Pars intermedia | Pars tuberalis | Pars distalis | Somatotropes | Lactotropes | Thyrotropes | Gonadotropes | Corticotropes This page uses Creative Commons Licensed content from Wikipedia (ver autores).

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