Track quiz
Twelve quick questions. Use the table if you get stuck.
| Lesson | The rule |
|---|---|
| Three steps | Digestion breaks food into simple forms. Absorption moves them into the blood. Egestion removes what is left. |
| The path | Food takes one path. It goes mouth, food pipe, stomach, small intestine, large intestine, anus. |
| Saliva and starch | Saliva breaks starch into sugar. Iodine turns blue-black when starch is there. |
| Cow and hen | A cow chews its food again. This is rumination. A bird has no teeth. Its gizzard breaks up the food. |
| Respiration | Breathing moves air in and out. Respiration uses oxygen to release energy from food. |
| Breathing parts | Fish use gills. Earthworms use moist skin. Lizards use lungs. A frog uses more than one surface. |
| Blood | The heart pumps blood through blood vessels. Blood carries food and oxygen to every part and takes waste away. |
| Leaving | Carbon dioxide leaves with the breath. Undigested food leaves through the anus. Only the second is egestion. |
| Air path | Air goes in through the nostrils and nasal passages. It passes down the windpipe and its branches to the alveoli. |
| Chest | To breathe in, the diaphragm moves down. The ribs move up and out. To breathe out, both move back. |
| Alveoli | Oxygen passes from the air into the blood. Carbon dioxide passes from the blood into the air. |
| Villi | Finger-like villi line the small intestine. They give a big surface for absorbing digested food. |
Which step moves simple food into the blood?
Which stop comes right after the stomach?
Chewed chapati turns only light with iodine. What happened to its starch?
A cow brings food back to its mouth. What is this called?
A student says breathing and respiration are the same. What is wrong?
Which part does a fish use to take in oxygen?
What does blood carry to every part of the body?
Where does carbon dioxide leave the body?
Which part of the air path traps dust and dirt?
What does the diaphragm do when you breathe in?
Where does oxygen pass into the blood?
Why does the small intestine have many finger-like villi?
Chapter 9 of your NCERT book is Life Processes in Animals. Read it this week.
Next: Life Processes in Plants.