What does SI mean? Definitions for SI Here are all the possible meanings and translations of the word SI.
The sebaceous glands are microscopic exocrine glands in the skin that secrete an oily or waxy matter, called sebum, to lubricate and waterproof the skin and hair of mammals.ebaceous glands secrete the oily, waxy substance called sebum (Latin: fat, tallow) that is made of triglycerides, wax esters, squalene, and metabolites of fat-producing cells. Sebum waterproofs and lubricates the skin and hair of mammals.
bulbocavernous gland , bulbourethral gland one of two glands embedded in the substance of the sphincter of the urethra, posterior to the membranous part of the urethra. cardiac glands mucin-secreting glands of the cardiac part (cardia) of the stomach. celiac glands lymph nodes anterior to the abdominal aorta.