THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Mechanical digestion involves physically breaking down food substances into smaller particles to more efficiently undergo chemical digestion. The role of chemical digestion is to further degrade the molecular structure of the ingested compounds by digestive enzymes into a form that is absorbable into the bloodstream.

Detailed explanation-2: -Food digestion is a chemical change. In this process, large macromolecules are broken down into smaller molecules. It is done by the enzymes found in the stomach and intestines.

Detailed explanation-3: -Chemical digestion, through a process called hydrolysis, uses water and digestive enzymes to break down the complex molecules. Digestive enzymes speed up the hydrolysis process, which is otherwise very slow.

Detailed explanation-4: -During chemical digestion, your food is broken down into very small pieces that your cells can absorb. Your cells will use the nutrients available from chemical digestion to make energy and new cells. This process is called metabolism.