what do they do?
They secrete the oily, waxy substance called 'sebum'
Sebaceous gland
Sebaceous glands secrete the oily, waxy substance called "sebum" () that is made of triglycerides, wax esters, squalene, and metabolites of fat-producing cells. Sebum lubricates the skin and hair of mammals.
infection of the sebaceous gland and the formation of pimples Acne any particular place where these glands are found? In humans, sebaceous glands occur on all parts of the skin except the palms of the hands and soles of the feet. when do they develop? They are first visible from the 13th to the 16th week of fetal development then the Sebaceous glands develop from the same tissue that gives rise to the epidermis of the skin.
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Sebaceous gland [SEP] Function
Relative to keratinocytes that make up the hair follicle, sebaceous glands are composed of huge cells with many large vesicles that contain the sebum. These cells express Na and Cl ion channels, ENaC and CFTR (see Fig. 6 and Fig. 7 in reference). Sebaceous glands secrete the oily, waxy substance called "sebum" () that is made of triglycerides, wax esters, squalene, and metabolites of fat-producing cells. Sebum lubricates the skin and hair of mammals. Sebaceous secretions in conjunction with apocrine glands also play an important thermoregulatory role. In hot conditions, the secretions emulsify the sweat produced by the eccrine glands and this produces a sheet of sweat that is not readily lost in drops of sweat.