Science Class 10
Life Processes
How a body gets food, breathes, pumps blood and removes waste.
21 lessons · ~167 min total
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Lessons in this topic
- 0 Start here A roadmap: nutrition, respiration, transport and excretion, in plants and animals. · 5 min You are here
- 1 Four processes, one body Nutrition, respiration, transport and excretion keep a body in repair. · 8 min
- 2 Makers and eaters Autotrophs make their own food; heterotrophs depend on food made by others. · 8 min
- 3 A meal taken apart in steps Food breaks down step by step along the alimentary canal. · 9 min
- 4 Respiration is chemistry Aerobic respiration uses oxygen; anaerobic respiration works without it. · 9 min
- 5 Why big bodies need a pump The heart pumps blood twice round the body: double circulation. · 9 min
- 6 Moving water in plants By day, evaporation at the leaf pulls water up the xylem. · 8 min
- 7 Filtering the blood Each nephron filters blood, then takes back what the body needs. · 9 min
- 8 Where urine goes Urine goes from the kidneys to the bladder, then out. · 8 min
- 9 What plants do with waste Plants let gases out, store some wastes, and shed or release others. · 8 min
- 10 How a leaf makes food A green leaf turns carbon dioxide and water into food, using sunlight. · 9 min
- 11 Test a leaf for starch Iodine turns blue-black where a leaf has made starch. · 8 min
- 12 The path of air Air flows down a branching tube to the alveoli. · 9 min
- 13 Where gases swap Alveoli are thin, many and wrapped in blood vessels. · 9 min
- 14 What blood carries Plasma, red cells and platelets each do a different job. · 9 min
- 15 White cells and lymph White cells fight germs. Lymph returns spare liquid to the blood. · 8 min
- 16 Three kinds of tube Arteries, veins and capillaries are each built for their job. · 9 min
- 17 How much urine? The kidneys take back more or less water as the body needs. · 8 min
- 18 Checkpoint: leaf, air, blood and kidney Seven marked questions on the leaf, lungs, blood and kidney. · 6 min
- 19 The big picture Seventeen ideas from Life Processes, on one screen. · 4 min
- 20 Track quiz The rules first, then one short question on each. · 7 min
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