AP BIOLOGY

Detailed explanation-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.

Detailed explanation-2: -Smoking cigarettes is the single biggest risk factor for lung cancer. It’s responsible for more than 7 out of 10 cases. Tobacco smoke contains more than 60 different toxic substances, which are known to be carcinogenic (cancer-producing).

Detailed explanation-3: -Tobacco use is the leading preventable cause of cancer and cancer deaths. It can cause not only lung cancer-but also cancers of the mouth and throat, voice box, esophagus, stomach, kidney, pancreas, liver, bladder, cervix, colon and rectum, and a type of leukemia.

Detailed explanation-4: -Smoking causes cancers of the lung, esophagus, larynx, mouth, throat, kidney, bladder, liver, pancreas, stomach, cervix, colon, and rectum, as well as acute myeloid leukemia (1–3).