Parts of the Human Digestive System

Saliva contains enzyme called amylase. Tongue mixes food with saliva.

Muscular tube that carries food from the mouth to the stomach.

Contraction and relaxation of the muscles of the oesophagus which helps to move the food down towards the stomach.

Walls of the stomach produce gastric juice (Pepsin, Hydrochloric acid, Mucus (protects the stomach)).

Churning of the stomach mixes the contents.

Pepsin breaks down proteins to amino acids.

Liver produces bile. Gall bladder stores the bile and sends it to small intestine. Bile emulsifies fats (forms small droplets).

Produces pancreatic juice which contains: Amylase, Trypsin, Lipase.

Divided into 2 parts: the Duodenum and the Ileum.

Receives bile and pancreatic juice. Chemical digestion occurs here.

Absorption of digested food molecules.

Movement of digested molecules into the bloodstream from the small intestine.

Absorb water from the remaining undigested waste. Contains bacteria of the gut (boost immune system, produce vitamins, digest food).

Stores faeces before removed from the body.

The opening where the faeces leave the body.

Removal of unused food waste from the body.