Spongy bone, also called cancellous or trabecular bone, provides structural support and facilitates movement of the joints and limbs. Spongy bone is light and porous and found in most parts of the body and in other bones that do not typically endure large volumes of mechanical stress.
A human baby is born with approximately 300 bones. As the child develops, some of these bones fuse together to form the 206 bones of the adult human skeleton. In fact, the newborn cranium has three infused plates at birth to allow the baby’s head to pass through the birth canal. The bones of the skull fuse together as the child ages.