Question

Why do people who smokes cigarettes are prone to lung cancer?

Answer 1

Smoking can cause cancer and then block your body from fighting it: Poisons in cigarette smoke can weaken the body's immune system, making it harder to kill cancer cells. When this happens, cancer cells keep growing without being stopped. Poisons in tobacco smoke can damage or change a cell's DNA.

Answer 2

The cigarrettes have over 4.700 chemical substances and most of them are harmful or even poisonous, damaging your airways and the alveoli. The chemicals can affect our health in many ways, as they can damage DNA and make it harder for the cells to repair damaged DNA. Cancer usually is associated to a DNA damage, causing the damaged cell to replicate uncontrollably, creating a tumour. Therefore, damages in DNA structure can lead to a cancerous tumour.