Question

Define the following terms :
A. Sweat glands
B. Dermis
C. Oil gland
D. Epidermis

Answer 1

Hint:-Dermis and epidermis are the two layers which form the skin. Protection is one of the functions of these glands. Sweat glands and oil glands are present in skin and are responsible for providing lubrication to the hair and the skin. The gland helps in the thermal regulation of the body.

Complete Answer:-
Sweat glands :
Sweat glands are a type of endocrine glands, glands that produce and secrete substances into an epithelial surface through a duct. There are two major types of sudoriferous glands that differ in their structure, function, secretory product and mechanism of action. The two types of sudoriferous glands are eccrine sweat gland and apocrine sweat gland.
Dermis :
Dermis is the layer of the skin that lies below the epidermis and above the subcutaneous layer. It is the thickest layer of the skin which is made up of fibrous and elastic tissue. This layer also provides strength and flexibility to the skin.
Oil Glands :
It is commonly known as sebaceous gland. Sebaceous glands are microscopic exocrine glands in the skin that open into a hair follicle to secrete sebum which is an oily or waxy substance, which lubricates the hair and skin of mammals. In humans, oil glands occur in the greatest number on the face and scalp, but also on all parts of the skin except the palms of the hands and soles of the feet. In the eyelids, the meibomian gland, also known as the tarsal glands, secrete a special type of sebum into tears.
Epidermis :
Epidermis is the uppermost layer of the skin it lies above the dermis. Epidermis layer protects the body from the infections from environment and pathogens and regulates the amount of water released from the body.


Note:- Sweat glands secrete oily substance but not oil. Sweat glands are also known as sudoriferous glands whereas oil glands are known as sebaceous glands. Dermis and epidermis are the protective layer of the body.