TRIPLE SCIENCE: The Breathing System

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Define Ventilation.
The movement of air into and out of the lungs.
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Why is ventilation needed?
So oxygen from the air can diffuse into the blood stream (and into cells for respiration) and so oxygen can diffuse out of the blood.
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When we breathe in the intercostal muscles and diaphram...
contract. Pressure falls.
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When we breathe out the ribcage and sternum move...
down and in. Pressure rises forcing air out of the lungs.
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What is an artificial ventilator?
a machine that moves air in and out of the lungs.
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Explain how a modern artificial ventilator works.
Air is pumped into the lungs, which expands the ribcage. When it stops pumping, the ribcage relaxes as pushes air back out of the lungs.
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Other cards in this set

Card 2

Front

Why is ventilation needed?

Back

So oxygen from the air can diffuse into the blood stream (and into cells for respiration) and so oxygen can diffuse out of the blood.

Card 3

Front

When we breathe in the intercostal muscles and diaphram...

Back

Preview of the front of card 3

Card 4

Front

When we breathe out the ribcage and sternum move...

Back

Preview of the front of card 4

Card 5

Front

What is an artificial ventilator?

Back

Preview of the front of card 5
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