ANATOMY

Detailed explanation-1: -3) As food passes through the digestive tract, it becomes less complex and the nutrients are more readily available to the body. 4) Some of the microbes that often invade other organs of the body are rarely found in the stomach. The reason for this is the presence of HCl.

Detailed explanation-2: -As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules. The body then absorbs these smaller molecules through the walls of the small intestine into the bloodstream, which delivers them to the rest of the body.

Detailed explanation-3: -Digestion is the complex process of turning the food you eat into nutrients, which the body uses for energy, growth and cell repair needed to survive. The digestion process also involves creating waste to be eliminated.

Detailed explanation-4: -The digestion is a complex process that converts a range of different types of food into molecular scale nutrients that can be absorbed in a controlled manner. This is achieved while simultaneously maintaining a barrier to infection.

Detailed explanation-5: -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.