There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.
I believe cancer causes death for all age groups because it's something that any age can get
<span>Uncontrollable risk factors are those that a person has no control over, such as genetics or family history. In Amanda’s case, her mother's heart disease is an uncontrollable factor. Controllable factors are her diet and amount of exercise. </span>
