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Slide 2

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1) Air goes through the mouth and nasal passages.
2) Next it goes through the trachea and one of the two bronchi into the
lungs.
3) After going through the bronchioles it enters the alveoli.
4) An exchange takes place: the oxygen enters the blood, and the
carbon dioxide leaves the body.…read more

Slide 3

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When you inhale:
· the intercostal muscles contract, expanding
the ribcage.
· the diaphragm contracts, pulling downwards
to increase the volume of the chest.
· pressure inside the chest is lowered and air
is sucked into the lungs.…read more

Slide 4

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When you exhale:
· the intercostal muscles relax, the ribcage
drops inwards and downwards
· the diaphragm relaxes, moving back
upwards, decreasing the volume of the chest.
· pressure inside the chest increases and air is
forced out.…read more

Slide 5

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Glucose + oxygen energy +
water + carbon dioxide…read more

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