Question

Skin is said to play an important role in excretion, due to the presence of
a. Sweat Glands
b. Sebaceous gland
c. Hair follicle
d. Hair cell
e. Both A and B

Answer 1

Skin is the vital organ, that protects the outside body from heat, germs, infection and forms a protective barrier against all the pathogens and infections from the environment. It is a soft and flexible tissue with the function of protection, regulation and sensation.

Complete answer:
Sweat glands are also known as sudoriferous glands, are present under the skin and produce sweat. Sweat glands are generally of two types:- Eccrine glands and Apocrine Glands. These glands are coiled tubular structures, which secret watery fluid known as sweat, this fluid helps in maintaining the thermal balance of the body. Sweat glands remove waste by secreting sodium salts, water and nitrogenous waste into the upper layer of skin. Sebaceous glands secrete sebum, which is oily in texture and which lubricates the skin and humans of mammals. The hair follicle is the structures through which the hair emerges. Hair emerges from the bottom of the hair follicle. Hair cells are the sensory receptors of the auditory and vestibular system of the body. As we know only sweat has to excrete property, so the answer is sweat glands.

Hence, the correct answer is option (A).

Additional information:
Sweating is one of the most visible physiological events that we experience. There are millions of sweat glands present in the body, whose main function is regulation of body temperature and excretion of nitrogenous waste. Failure of sweating can lead to heatstroke, heat exhaustion, and hyperthermia.

Note: Sweat glands occur all over the body, but are most numerous on the forehead, the armpits, the palms and the soles of the feet. Sweat is only water, but it also contains some sodium salts. Its main function is to control body temperature and cool the body. As the water in the sweat evaporates, the surface of the skin cools.