Answer:
Tobacco interferes with the sweeping motion of cilia that aids in the movement of the egg toward the uterus.
Step-by-step explanation:
The nicotine in cigarettes affects the cilia by stoping their sweeping motion. If the sweeping notion of the cilia in the fallopian tubes is affected, it is harder for the egg to move towards the uterus, causing an ectopic pregnancy.
There are also cilia in the airways that help to move mucus and particles out of the body when they do not work the person coughs to get rid of the mucus and particles.