Question

Why is skin known as “Jack of all trades”?

Answer 1

Hint: ”Jack of all trade” is a phrase which means something or someone is capable of doing various works at the same time. It can be related to the capability of having various work skills. Skin is the outermost covering of the body that performs various important functions.

Complete answer: The skin is the outermost and the largest protective organ of the human body. It is made up of several layers that form a covering all over the body. It is soft flexible tissue present as outer covering in the vertebrate animals. The skin serves three main functions. These functions are protection, regulation, and sensation. The skin is called “Jack of all trades” because it has various functions that assist in life processes. The skin’s major function is protection. It covers the body and provides protection from shocks and stresses experienced by the physical world. It holds the organs in place. It protects from various germs and pathogens by acting as the primary shield. It forms a major unit of the innate immune system. The second major function of the skin is regulation. The skin is responsible for balancing body temperature. Sweating through the skin helps in homeostasis. Also, skin provides insulation from cold conditions. The third important function performed by the skin is sensation. The skin is one of the five sensory organs of the human body. The skin consists of thousands of sensational nerve endings. These endings bear the pain and temperature sensors that detect changes in the environment. These inputs allow the body to decide on how to react towards a particular situation. Also, the skin has various glands embedded in it. One of these is the sweat gland. It is responsible for the excretion of waste from the body in the form of sweat.

Note: The skin has many more important functions that aids in other metabolic processes. The skin consists of melanin pigment, which is responsible for skin colour. Also, it absorbs sunlight and results in vitamin D production which is required for good bone health. The hairs on the skin also provide protection and sensations.