Question

Why is skin called “Jack of all trades”?

Answer 1

The term "a jack of all trades" is a shortened version. This phrase is often used to convey a compliment to a person who is very good at fixing things and providing support, and also has a very good and broad knowledge.

Complete answer:
Skin is the organ which is known as “the jack of all trade” as the skin is the primary organ of the human body which perform important body functions for instance sweating through the sweat pores from the skin eradicate urea and the excess salts like NaCl from our body and also perform many other functions.

Skin is a layer of soft, flexible tissue which covers the body of a vertebrate animal on the outside. It performs three major functions, namely, protection, regulation, and sensation. In mammals, the skin is the organ in the integumentary system which is made up of several layers of ectodermal tissue and protects the primary muscles, bones, ligaments and other internal organs.

The major functions of the skin are:
1.Protection from routine wear and tear.
2.Protection against various infections and harmful chemicals.
3.Protection against ultraviolet rays especially, UV-A and UV-B.
4.Maintaining the standard body temperature.
5.Responding to the increased temperature.
6.Responding to the fall in temperature.
7.Receiving the stimuli from the surroundings.
8.Excretion and absorption.

Note: The skin keeps all the vital chemicals and nutrients inside the body and provides a barrier against many dangerous substances from entering inside the body and also provides guard from the harmful effects of ultraviolet rays emitted by the sun especially, UV-A and UV-B.