The digestive system is an example of an organ system in which humans and other mammals exchange substances with the environment. The table shows its main tissues and organs, and their functions:

Part(s)Function Pancreas and salivary glands Produce digestive juices Stomach Digests food Liver Produces bile Small intestine Digest and absorb soluble food Large intestine Absorbs water from undigested food, producing faeces

Organs

Organs are made of tissues. A particular organ may contain several different tissues. For example, the stomach is an organ that contains:

• Muscular tissue - to churn…