The stomach is a muscular sac that is important for absorbing food and preparing food for further digestion.
Proteins are complex structured molecules composed of chains of amino acids. They are required for the structure, function, and regulation of the body's cells, tissues, and organs. Proteins assist in the performance of essential structural functions within the body. Humans cannot synthesize all of the 20 standard amino acids that make up proteins; hence they must obtain some through diet.