Processing of the toxic substances in the blood by the liver.

Synthesis of vitamin D to enhance calcium absorption .

Transport of glucose to the liver for storage.

Transport of amino acids for tissue repair.

Increased rate of protein synthesis in the muscles.

Movement of the food in the gastrointestinal tract

Control of the release of enzymes.

Assimilation in tissues for the synthesis of complex compounds.

Defecation reflex

The integumentary system benefits from the digestive system because of the oils and fats that it provides from digestion.

Vitamin D from the skin helps in the absorption of magnesium in the intestines.

The glucose molecules from the small intestine are transported to the spleen for storage.

The circulatory system also helps the digestive system by transporting chemical messengers or hormones.

The liver has a waste processing ability.

Pepsin secretion is enhanced by the hormone gastrin.

Adrenaline enhances blood flow to the stomach.

The hormone cholecystokinin signals the release of pancreatic juice.

Intrinsic nerve regulators enhance the production of enzymes when food enters the intestine.

Digested fat molecules enter the capillaries and veins so that they can be transported to target organs.