| A | B |
|---|
| inhaling | 1st part of breathing, taking in oxygen through the respiratory system |
| exhaling | 2nd part of breathing, removal of waste gases from respiratory system |
| diaphragm, chest muscles, ribs & sternum | body parts that expand chest cavity during inhalation |
| diaphragm, chest muscles, ribs & sternum | body parts that contract chest cavity during exhalation |
| decreases | what happens to the air pressure in your chest cavity when the diaphragm contracts |
| increases | what happens to the air pressure in you chest cavity when the diaphragm relaxes |
| The way air moves | air goes from an area of greater pressure to an area of lower pressure |
| 21% | amount of oxygen in air that you inhale |
| 17% | amount of oxygen in air that you exhale |
| reason oxygen content changes during breathing | your body uses some of the oxygen |
| inside cells in the body | where respiration takes place |
| breaks down food into glucose | how does the digestive system aid in respiration |
| carries oxygen to cells and takes away carbon dioxide | how the circulatory system aids in respiration |
| What two things combine during respiration? | glucose and oxygen |
| energy | what does respiration release |
| carbon dioxide + water | the waste created by respiration |
| chemical equation for respiration | glucose + oxygen ==> carbon dioxide + water + energy |
| the body does not use nitrogen | why the concentration of nitrogen inhaled and exhaled is the same |
| why you don't have much energy when you have a cold | a stuffy nose limits the intake of oxygen, which is needed to combine with glucose to release energy |
| why you need fresh air | oxygen keeps your body healthy |
| one week or more | how long can you live without food |
| a few days | how long can you survive without water |
| Why do you always need oxygen? | The body does not store oxygen. |
| What do people have in common with all living organisms? | the need to absorb gases from the environment and release waste gases |
| two jobs of the respiratory system | supply cells with oxygen and remove waste gases from body |
| blood carries oxygen to the cells | why the respiratory system needs to pass oxygen to the blood |
| How does the circulatory system helps get rid of waste gases? | The circulatory system carries waste gases from the cells to the lungs to be exhaled. |
