lesson
Different substances need transport
1 · Learn
Blood carries oxygen from the lungs towards body tissues and carries carbon dioxide back towards the lungs. Digested nutrients and water are absorbed into the body and transported to where they are needed.
Blood contains liquid plasma and cells with different jobs. Red blood cells carry oxygen; white blood cells help defend the body. Food does not travel around the blood as recognisable pieces of a sandwich: digestion breaks it down first.
2 · Worked example
After food is digested, absorbed nutrients can be carried in the circulation. This links digestion with transport rather than treating each body system as isolated.
3 · Your turn
Why is 'the heart pumps pieces of food through the body' inaccurate?
Check your answer
Food is digested and nutrients absorbed before transport. The heart pumps blood, not undigested food pieces.
4 · Apply your learning
Make a labelled flow diagram connecting digestion, absorption and circulation using arrows with explanations.
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Keep the model simple and accurate. Avoid claims about an individual learner's diet or health.
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Check a calculation · Year 5 onward
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