Question

Which part of the body is called a “police guard”
(a) Tonsils
(b) Liver
(c) Skin
(d) Leukocytes

Answer 1

Hint: It is the organ that covers the whole body. It is one of the five sense organs i.e. it contains sensory nerves responsible for touch. It is made of epithelial cells and protects the body from damage.

Complete answer:
The skin is the part of the body that protects the body from the outer elements hence it is called the police guard of the body. The skin protects the internal muscles and organs of the body from extreme environmental disturbances such as heat and cold. It is the first line of defense against any infection that may occur to the body.
-The skin also secretes some secretions that help in killing any pathogen that may attack the body.
-The skin also undergoes squamatization regularly by which it elements any dead cells as well as any microorganisms that may be stuck to it.
-In some organisms, poison glands are present in the skin which helps in avoiding predation by other organisms.
Tonsils and leukocytes are also part of the immune system but they are not called the ‘police guard” because they are not the first level of defense. Similarly, the liver is not called the ‘police guard” as it is more concerned with detoxification of the body.
-Tonsils are larger non-encapsulated or partially encapsulated masses of lymphatic tissue. They are responsible for the direct transport of foreign material from the outside to the lymphoid cells.
-Liver plays a critical role and has the main function of detoxifying various metabolites also involved in protein synthesis, and produces essential biochemicals that are helpful for digestion and growth.
-Leukocytes are cells of the system, which play an important role in protecting the body against infectious diseases and foreign bodies. These cells are present in the blood and kill the parasites or foreign bodies that enter the body.
-All of the given options protect or perform one or the other function, but all of these are covered by an external organ that acts as a police guard.

So, the correct answer is “Skin”.

Note:
Skin also helps in the excretion of waste material. Through sweat, the skin excretes any extra minerals and some toxins that can be present in the body. The skin by producing sweat also helps in osmoregulation as the water present in sweat helps in cooling down the body.