Why do the cells of the digestive system secrete proteolytic enzymes

Proteolytic enzymes are secreted by cells of the digestive system in order to make digestion of protein possible.

Explanation:

Proteolytic enzymes are the enzymes which acts on protein substances in the body. This enzymes converts the protein by breaking it into smaller pieces to form amino acids.

These enzymes are majorly found in the Stomach and small intestine. Examples of proteolytic enzymes include pepsin, renin etc.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.