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