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🫀 The Human Respiratory and Circulatory Systems
Primary 5 · P5🫀 Systems
Take a breath and follow the oxygen: through your nose, windpipe and lungs, then around your whole body in the blood.
What you'll learn
- Air is a mixture of nitrogen, oxygen, carbon dioxide and water vapour
- Gaseous exchange happens in the lungs: oxygen is taken in and carbon dioxide is removed
- The circulatory system — heart, blood, blood vessels — carries oxygen, food and water around the body
- The digestive, respiratory and circulatory systems work together for the survival of living things
- Plants, fish and humans all take in oxygen and give out carbon dioxide — in different ways
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