Answer:
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.
Explanation:
Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.
Because they don't want to:) and because of the gravitational pull of the sun.
Answer:It is a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules into adenosine triphoshate and can release waste products.
Explanation:
