Protein digestion in humans is primarily carried out by three enzymes. pepsin is found in the stomach (ph₂), where it aids in the breakdown of large proteins into smaller peptides, while trypsin

Trypsin is an enzyme that digest protein by the catalysis of the hydrolysis of peptide bonds, in the small intestine. It's also called a proteolytic enzyme or proteinase.

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.