| A | B |
|---|
| What is respiration? | taking in oxygen and giving off carbon dioxide |
| What is the first stage in respiration? | external respiration |
| What is inhaled? | oxygen |
| What is exhaled? | carbon dioxide |
| How are oxygen and carbon dioxide exchanged? | oxygen enters the blood and carbon dioxide leaves the blood in the alveoli of the lungs |
| How doe oxygen enter the blood? | Through alveoli walls |
| What is the second stage? | Transporting oxygen and carbon dioxide between the lungs and cells |
| What is the vehicle for the second stage? | blood vessels |
| What is hemoglobin? | iron containing protein |
| What happens to carbon dioxide? | It is taken from the cells to the lungs in plasma |
| What does oxygen combine with? | hemoglobin |
| What is the third stage of respiration? | internal respiration |
| Where does internal respiration happen? | body cells |
| What happens to the oxygen ? | oxygen combines with cell nutrients |
| waht does this chemical reaction produce? | energy |
| What by-products are also formed? | wanter and carbon dioxide |
| Waht happens to carbon dioxide? | carbon dioxide is exhaled |
| Why is carbon dioxide exhaled? | carbon dioxide is exhaled because it would accumulate and become toxic |
| Formula for internal respiration? | food + oxygen = carbon dioxide + water + enerby |
| Using oxygen to burn food is called what? | oxidation |
