Doctors look to see if the growth plates have fully closed, or are still open. Specifically in the long bone, doctors are looking at the Epiphyseal Plate.
A teenager. In a new-born baby smaller bones have not developed yet. The palm of a baby's hand (for example) has no bones, only cartilage. The cartilage turns into bones as the baby grows.
For women, their bones stop growing from the ages of 21-25.For men, their bones stop growing from ages 18-21.
no
The doctor is looking at the growth plates which are located at the ends of long bones. If the growth plated have ossified this means that the person will not grow any more. Long bones do not grow from the middle outward they grow from the ends of the bones through constantly dividing and adding new bone. The x-rays will reveal this. If is determined that the bones are still growing then doctor will not give the growth hormone.
We all have cartilage at the tips of our growing bones but as we get older and stop growing the cartilage has mainly disappeared. This growing process is generally completed by the time we are 25 years old. Babies and young children would have a larger amount of cartilage than a teenager. Adults have cartilage in their ears and nose.
Nope
The shaping of the head is done when a baby is first born. Doctors are able to shape the head because the bones of the skull are still very soft. The skull is too hard to be shaped as a teenager.
35
turn into cartilage
magnesium
Yes.
It is hard to know what is meant by "test" in this setting. A common "test" for bones is an xray.