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How many types of blood? What are they?
4 types: A, B, O, AB
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The heart beats more ... when we do exercise.
quickly
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How many bones in human body?
206 bones
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Bones are ... percent of water.
75
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How many times does a heart beat in 1 minute?
72
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The most common blood type is ...
O
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What is this?
Muscles
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What do the lungs do?
Lungs pass the oxygen to our blood.
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How many muscles are there in our body?
600
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What are these?
Lungs
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What is this?
Bone
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What do muscles need to work well?
Oxygen
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