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The respiratory syst
Ch 6
Question | Answer |
---|---|
External respiration/ breathing is | taking in oxygen and giving out carbon dioxid |
Tube leading from the nose to the lungs | Trachea |
the trachea divides into two tubes called | bronchi |
the bronchus divides into | bronchioles |
air sacs for gaseous exchange | alveoli |
muscles between the ribs | intercostal |
muscle under the lungs | diaphragm |
gas we breath in | oxygen |
gas we breath out | carbon dioxide |
gas in the air which remains unchanged during breathing | Nitrogen |
movement of gas | diffusion |
to breath in | volume of lungs increases , pressure decreases air goes in |
to breath out | volume of lungs decreases , presses increases air goes out |
average number of breaths per minute | 16 |
to test for carbon dioxide use | limewater. it goes from clear to milky white |
the epiglottis | covers the trachea |