The carbon dioxide given out by the animals is used up by the ____________.
plants
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15
What happens to our breathing rate when we exercise?
faster, increase
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15
In most plants, stomata are found mainly on the underside of leaves. This is to prevent
water loss or water inside the plant from evaporating too quickly
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15
In the lungs, the air tubes branch into tiny tubes that end in air sacs. The air sacs are surrounded by blood vessels. What important process takes place in the air sacs?
gas exchange
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15
The type of gas needed by living things such as animals to stay alive.
oxygen
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eraser
Reset score!
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gift
Win 20 points!
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shark
Other team loses 20 points!
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baam
Lose 25 points!
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15
How do plants take in and give out air?
tiny openings called stomata
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15
The _________ in the nostrils remove dust from the air we breathe in.
hairs
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boom
Lose 50 points!
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gift
Win 15 points!
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shark
Other team loses 15 points!
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lifesaver
Give 25 points!
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25
What is air made up of?
nitrogen, oxygen, carbon dioxide, water vapour and other gases.
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15
How does gas exchange in our lungs take place?
The inhaled oxygen will pass through the wall of blood vessels and enter the blood stream while carbon dioxide from the blood moves out into the lungs.