AP BIOLOGY

Detailed explanation-1: -The digestive system breaks down food into nutrients such as carbohydrates, fats and proteins. They can then be absorbed into the bloodstream so the body can use them for energy, growth and repair.

Detailed explanation-2: -Carbohydrate, protein and fats require digestion before they can be absorbed in monomer form. Fat soluble vitamins are absorbed along with dietary fat, whereas water soluble vitamins are absorbed by passive diffusion. Vitamin B12 is absorbed with Intrinsic factor by forming a complex.

Detailed explanation-3: -Absorption. The simple molecules that result from chemical digestion pass through cell membranes of the lining in the small intestine into the blood or lymph capillaries. This process is called absorption.

Detailed explanation-4: -What happens to the digested food? The small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use. Special cells help absorbed nutrients cross the intestinal lining into your bloodstream.