THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The islets of Langerhans are endocrine functional units of the pancreas. Histologically, four cell types can be identified: the or A cells that secrete glucagon; the or B cells that secrete insulin; the or D cells that secrete somatostatin; and the PP cells that secrete pancreatic polypeptide.

Detailed explanation-2: -The beta cells of the pancreatic islets of Langerhans respond to changes in glucose concentration by varying the rate of insulin synthesis and secretion. Beta cells sense glucose concentration by the levels of the products of glucose catabolism.

Detailed explanation-3: -On histology slides, the pancreas can look very similar to other glandular tissue, such as the parotid gland. However, one unique feature of the pancreas that differentiates it from other glands are the pancreatic islets, which are clearly demarcated from the pancreatic acini.