| A | B |
|---|
| breathing | the respiratory system controls this |
| nose | the nasal cavity is behind this |
| mucus | a liquid that traps dirt and dust |
| sinuses | hollow spaces in the face |
| trachea | another name for windpipe |
| alveoli | air sacs located at the end of the bronchioles |
| oxygen | this passes into the blood from the alveoli |
| circulatory system | this moves blood throughout the body |
| arteries | these carry blood away from the heart |
| exhale | when you breathe out you |
| veins | carry blood to the heart |
| carbon dioxide | a waste gas |
| inhale | when you breathe in you |
| cells | the smallest parts that make up a living thing |
| system | a group of body parts and organs that work together to perform a job |
| tissue | cells of the same kind group together and form |
| organ | several kinds of tissue that work together form an |
| capillaries | blood vessels that connect arteries and viens |
| heart, blood, blood vessels | 3 main parts of the circulatory system |
| 4 ways to keep your heart healthy | exercise, get plenty of sleep, don't smoke, eat healthy food, don't be overweight |
| the path air takes | in through nose or mouth, down trachea, to bronchi, to bronchioles, to alveoli then to the blood. |
