Unit 5 HUMAN NUTRITION

1. The digestive system obtains the nutrients that we need from food.

2. The digestive tract is made up of the mouth, pharynx, oesophagus, stomach, small intestine, large intestine and anus.

3. The accessory organs produce substances which support digestion. These are the salivary glands, the liver and the pancreas.

4. The respiratory system takes in oxygen and eliminates carbon dioxide.

5. The respiratory tract is made up of the nasal cavity, the pharynx, the larynx, the trachea and the bronchi.

6. The lungs are in the thorax separated from the stomach by the diaphragm. They are made up of the bronchi and alveoli.