Development of the endocrine system alpha cells. The insulin concentration within the fetal pancreas is 3.6 pmol/g at seven to ten weeks, which rises to 30 pmol/g at 16–25 weeks of gestation. Near term, the insulin concentration increases to 93 pmol/g. The endocrine cells have dispersed throughout the body within 10 weeks. At 31 weeks of development, the islets of Langerhans have differentiated. While the fetal pancreas has functional beta cells by 14 to 24 weeks of gestation, the amount of insulin that is released into the bloodstream is relatively low. In a study of pregnant women carrying fetuses in the mid-gestation and near term
Eccrine sweat gland sweat than normal. Similarly, cystic fibrosis patients also produce salty sweat. But in these cases, the problem is in the CFTR chloride transporter that is also located on the apical membrane of eccrine gland ducts. Dermcidin is a newly isolated antimicrobial peptide produced by the eccrine sweat glands. Eccrine sweat gland Eccrine glands (; from "ekkrinein" "secrete"; sometimes called merocrine glands) are the major sweat glands of the human body, found in virtually all skin, with the highest density in palm and soles, then on the head, but much less on the trunk and the extremities. In other mammals, they