Why is immune system essential for our health?

A.VERIFIED ANSWERfact-checked by tutors

Soln:

Immune system is the defense line of our body. Immune system comprise of different kind of cells that kills the infecting microorganism. When a pathogen enters our body our immune system send immune cells to fight and kill pathogens. If our immune system clear the disease causing pathogens we stay healthy. If our immune system fail to clear pathogen we encounter disease. In order to be healthy immune system is essential.

Suggested Q&A

SCIENCE · CLASS 9

ScienceCLASS 9
1. Why does the temperature of a substance remain constant during its melting point or boiling point?
ScienceCLASS 9
Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. Sponge though compressible is a solid.
ScienceCLASS 9
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
ScienceCLASS 9
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
ScienceCLASS 9
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment
ScienceCLASS 9
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.