THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The food contains three macronutrients that require digestion before they can be absorbed: fats, carbohydrates, and proteins. Through the process of digestion, these macronutrients are broken down into molecules that can traverse the intestinal epithelium and enter the bloodstream for use in the body.

Detailed explanation-2: -Most of the vitamins and minerals you consume are also absorbed in the small intestine, but each one requires its own unique mechanism to cross the intestinal cell lining.

Detailed explanation-3: -Vitamins are used in their original form by the cells. They do not require digestion. They are either water soluble or fat soluble, hence no enzyme is required to digest vitamins.