Science Class 7
Life Processes in Animals
Learn what a body does with food, air and blood, and where waste goes.
17 lessons · ~73 min total
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Lessons in this topic
- 0 Start here What a body does with food, air and blood, and where the leftovers go. · 3 min You are here
- 1 Digestion, absorption and egestion Food is broken down, moved into the blood, and what is left is removed. · 4 min
- 2 One path, and a job at every stop Food takes one path. Each stop along it has its own job. · 4 min
- 3 Saliva and starch Teeth crush food. Saliva breaks starch into sugar, so chewed rice tastes sweet. · 4 min
- 4 Ruminants and birds A cow chews its food again. A bird has a gizzard instead of teeth. · 4 min
- 5 Checkpoint: what a body does with food A quick graded check on the first four ideas about food. · 4 min
- 6 Breathing is not respiration Breathing moves air. Respiration uses oxygen to release energy from food. · 5 min
- 7 Lungs, gills and moist skin Different animals take in oxygen through different parts. · 4 min
- 8 Getting food and oxygen around Blood carries food and oxygen to every part. The heart keeps it moving. · 4 min
- 9 What a body cannot use has to leave Carbon dioxide leaves with the breath. Undigested food leaves through the anus. · 4 min
- 10 The path of air Air goes from the nostrils to the alveoli, part by part. · 5 min
- 11 How the chest moves The diaphragm and ribs move. Air comes in, then goes out. · 5 min
- 12 Gases swap at the alveoli Oxygen goes into the blood. Carbon dioxide comes out into the air. · 5 min
- 13 Villi give food a way in Finger-like villi give the small intestine a big surface. · 5 min
- 14 Checkpoint: the breathing path, the chest and villi A quick graded check on breathing and villi. · 4 min
- 15 The big picture Twelve ideas, one shape: take something in, carry it round, remove the rest. · 3 min
- 16 Track quiz Twelve quick questions on life processes. The rules are at the top. · 6 min
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