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