nutrition and oxygen
lungs and muscles
The muscles make things move, the skeleton provides the leverage and the structure on which everything is supported.
Muscles do two things: they can contract, and they can relax. They do not do anything else.
Bone and tissue baby
So that we can pull and push both.
You need two things before you can discuss difference between them!You need two things before you can discuss difference between them!You need two things before you can discuss difference between them!You need two things before you can discuss difference between them!
Because they control us and if we didn't have them we'd do things uncontrolled
you need muscles to move...
drink lots of milk, and use the muscles to which the bones are attached.
protect you from the suns harmful rays and keep your muscles from showing.
carbohydrates
Two things could be the cause, one is you are not pushing yourself hard enough. But most likely it is because you are not eating the right things to give you muscles what they need to get larger. and also, dont always assume that just because your muscles arn't getting bigger, doesnt mean they arnt getting stronger.