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comparison with endocrine gland
It is important to distinguish between an endocrine gland, which discharges hormones into the bloodstream, and an exocrine gland, which secretes substances through a duct opening in a gland onto an external or internal body surface. Salivary glands and sweat glands are examples of exocrine glands. Both saliva, secreted by the salivary glands, and sweat, secreted by the sweat glands, act on...
Cystic fibrosis affects the functioning of the body’s exocrine glands—e.g., the mucus-secreting and sweat glands—in the respiratory and digestive systems. Within the cells of the lungs and gut, the CFTR protein transports chloride across cell membranes and regulates other channels. These functions are critical for maintaining and adjusting the fluidity of mucous secretions. Most...
description and function
...or meshwork, of blood vessels. Endocrine, or ductless, glands (e.g., pituitary, thyroid, adrenal) secrete substances known as hormones directly into the bloodstream rather than through ducts. Exocrine glands (e.g., salivary, sweat, digestive) discharge their products through ducts.
The glands of the skin are all exocrine, that is, they secrete their products, usually through ducts, to the epidermal surface. They may be unicellular, as are the goblet cells of fishes, or multicellular, as are the sweat glands of humans. Some multicellular glands are tubular and extrude their secretion into a central space or lumen; some, like the oil-producing sebaceous glands of mammals,...
...by abnormal growth of cells in the pancreas, a 15-cm- (6-inch-) long gland located behind the stomach. The pancreas is primarily made up of two different tissues with separate functions: the exocrine pancreas, which secretes enzymes into the digestive tract, aiding the breakdown of fats and proteins, and the endocrine pancreas, which secretes glucagon and insulin into the bloodstream in...
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