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