Give the impact of radiations on human body.

Radiations affect living organisms. They cause harmful changes in the body cells and at genetic level. Some impacts of radiations on human body are-

1. Genetic variations — The damage caused by radiations is often seen in the offsprings and may be transmitted to many generations.
2. Somatic variations — Short term exposures to radiation can cause damage to organs of the body. The harm done by them includes breast cancer, thyroid cancer, lung cancer and brain cancer, sterility and defective eyesight.