THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Once proteins are denatured in the stomach, the peptide bonds linking amino acids together are more accessible for enzymatic digestion. That process is started by pepsin, an enzyme that is secreted by the cells that line the stomach and is activated by hydrochloric acid.

Detailed explanation-2: -Once a protein source reaches your stomach, hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids. Amino acids are joined together by peptides, which are broken by proteases. From your stomach, these smaller chains of amino acids move into your small intestine.

Detailed explanation-3: -Chemical Changes Gastric fluids also mix with the food. These fluids contain the enzyme pepsin, which breaks down proteins into short chains of amino acids. Hydrochloric acid provides the acid environment in which pepsin works best.

Detailed explanation-4: -A chemical digestion process called enzymatic hydrolysis can break the bonds holding the molecular ‘building blocks’ within the food together. For example, proteins are broken down into their ‘building block’ amino acids.