they reproduce
You will not grow as your body needs protein to grow!
The cell grow bigger
have a dwarfism
The cell grow bigger
Simple,the cell in their body multipliy
Cell membrane
cyclins proteins (cell regulators)
it give up oxygen to the cell.
You grow nipples all over your body.
it gets bigger and changes as you grow and age
as you grew, most of your cartilage was replaced by bone.
You get "goose bumps" and your hair starts to grow if you have shaved legs :)