student answer

left atrium, right atrium, valves, right ventricle and left ventricle

red: carry oxygen from the lungs to all body cells. white: protect us from germs.

takes place in the large intestine and faeces leave the body through the anus

the right and left atria

begins in the mouth,teeth break down food&mix with saliva from salivary glands making bolus which is pushed into the pharynx&down the oesophagus to the stomach

Carrying out gas exchange

Circulates blood and other substances in the body. It is formed by the heart, blood vessels and blood

Proteins, vitamins and minerals, fats and carbohydrates

They are healthy substances obtained from food.

mouth, salivary glands, pharynx, oesophagus, stomach, large intestine, small intestine, liver, pancreas, anus

False. The diaphragm contracts and descends, creating space for the lungs to expand