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: -Chemical digestion breaks large food molecules down into their chemical building blocks, which can then be absorbed through the intestinal wall and into the general circulation. Intestinal brush border enzymes and pancreatic enzymes are responsible for the majority of chemical digestion.

Detailed explanation-3: -Amylase, maltase, sucrase, lactase, etc. convert carbohydrates into monosaccharides and disaccharides in the small intestine. Fats are converted to fatty acids and glycerol by lipases in the small intestine.