<span>In the infant and then in the baby, brain growth is not over, it needs space to grow over months. These cartilaginous spaces allow the brain to take on the full scale it needs.
The ossification of fontanelles varies from one child to another. Indeed, the volume of the skull reaches its adult size between 18 months and 3 years. <span>It is at this age that the bones will gradually weld, which will lead to the disappearance of fontanelles.</span></span>
Answer:
Bones
Explanation:
The integumentary system is the skin. You have erector pilli muscles, blood vessels and nerves all within the skin. But not bone
Skeleton muscles relay on contractions to move the bone they are attached to so it can contract and relax
