What is the purpose by sebaceous glands?

Answer 1

because they secrete sebum
Sebaceous glands are oil glands that are in the hair follicles in our skin.
The function of Sebaceous Glands is to produce an oily secretion, called sebum, which is your skin's natural lubricant.
Sevaceous glands contain groups of specialized epithelial cells and are usually associated with hair follicles. They are holocrine glands that secrete an oily mixture of fatty material and cellular debris called sebumm through small ducts into the gair follicles. Sebum helps keep the hair and skin soft, pliable, and waterproof.

It secretes sebum.
because they produce oil that would keep our skin lubricated and protected Sebaceous glands produce oils to lubricate the skin. Produce oil to the lubricate the skin
The sebaceous glands produce an oily fluid called sebum that helps keep hair and skin soft and regulates body heat by controlling the evaporation rate of perspiration.

Answer 2

They secrete a waxy oil substance called sebum into hair follicle. Sebum, a type of natural oil produced by your body, it is what makes your hair healthy and shiny. If you have over active sebaceous glands then it can cause an odor or your hair can appear too oily or even have clots of oily skin flakes. If your sebaceous glands are under active you can have a dry scalp that feels tight.
Sebum, a type of natural oil produced by your body, it is what makes your hair remain healthy and shinny.

Answer 3

Sebum