You cannot make specific body parts grow unless you take hormonal supplements which can cause certain reproductive organs grow. But if you are wanting your arms to get longer you cannot really do that. The best way to make one part grow is to grow all over.
... well i can make parts of my body grow in length
You cannot make your body or parts of your body grow. Weight loss also doesn't play a part in causing you to grow much, either. Growth is pre-determined by your genetics, along with some outside factors. You cannot control it.
No.
No they can not
No body parts actually make protein, but the body is full of protein. The hair, nails, muscles, and cells are just a few parts of the body that rely on protein to function and grow properly.
nails and hair!
because they are stronger than the other parts of the body
all body parts grow due to the increase in number of cells in them.
yesh
They can grow back their arms.
it just does its nature
they use it to build body parts and make cells