- The digestive system is a series of linked organs which work together to process food.
- The functions involve the enzymatic hydrolysis of food molecules and the absorption of the products of this breakdown.
|Oesophagus||Carries food from mouth to stomach||Muscular wall or peristalsis||Transport|
|Stomach||Stores and digests food. Kill bacteria by having a pH of 2||Muscular sac with inner layer that releases acid and enzymes||Digestion|
|Small Intestine||Digests food using enzymes released from its walls. High surface aids absorption||A long muscular tube with folded walls to increase the surface area||Digestion/Absorption|
|Large intestine||Absorption of water and the formation of faeces||Muscular tube||Absorption|
|Salivary glands||Releases saliva containing amylase of starch digestion||Glands near mouth||Digestion|
|Pancreas||Releases pancreatic juice which contains digestive enzymes into the small intestine.||Large leaf-shaped gland close to stomach||Digestion|
- Digestion is the chemical breakdown by hydrolysis of large insoluble food molecules by enzymes into smaller more soluble molecules that can be absorbed and assimilated.
- Digestion may be mechanical (mastication, chewing) or chemical (enzymatic, acidic).
- Some of the main food molecules of note are proteins and carbohydrates.