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Respiratory System
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Gaseous exchange is the diffusion of which gasses?
carbon dioxide and oxygen
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What is the percentage of CO2 during exhalation? (0.04%, 4%, 14%)
4%
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Where does gaseous exchange take place?
Alveoli
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What is missing: 'nose, ...., larynx, ......, bronchi, bronchioles, alveoli'
Pharynx, Trachea
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Respiration is the movement of ....
air in and out of the lungs. (Pass oxygen into the circulatory system (to produce ATP). remove carbon dioxide from the circulatory system.)
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Diffusion is the movement of molecules from an area of ..... concentration to an area of ....concentration.
higher, lower
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The main muscles involved in breathing are... (3)
Diaphragm, internal and external intercostal muscles
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Surrounding each alveolus are ...
a network of capillaries
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Where are the lungs located?
Within the thoracic cavity.
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During inhalation, what is the action of the diaphragm?
Contracts, flattens and moves down.
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