Most cases of lung cancer is due to smoking. From the anatomy and physiology explain why?

Answer 1

By taking in the carcinogens from the smoke it could cause mutations in the cells in the lungs thus causing cancer.

Answer 2

Any time that a tissue of any type is irritated over and over again for a long time, it has a high potential to cause cancer to that tissue. Smoke of anytype is irritating to the lung tissue and that is the cause.

Answer 3

Physiologically, the nicotine inpedes apoptosis, your body's process of destroying mutated cells. Without this clean up process, those cells are allowed to potentially grow into tumors.

Answer 4

Cigarette smoke contains countless carcinogens - one of which is benzopyrene. Benzopyrene has been shown to interefer with p53 activity. p53 is a well-known tumor suppressor gene. If you suppress the activity of a tumor suppressor such as p53, you allow for uncontrolled tumor formation.