Nerves and blood vessles are essential in maintaining healthy bone structure. Since the bone is actually vibrant living tissue, the outer membrance is vital in the protection of the inter-networking of key vessles, much like the way that the ribcage protects the lungs
calcium
No insect have bones. They have a hard outer covering, but no bones.
Yes, bones have an outer membrane. The periosteum is the outermost covering layer of the bone.
they proctect the body if is danger
Periosteum is a membrane that lines the outer surface of all bones,[1] except at the joints of long bones.
Periosteum is the membrane that lines the outer surface of all bones, except at the joints of long bones.
what is seahorse outer-covering
The outer covering of the grain is called Husk.
Amphibians do not have outer covering.
an ant's outer covering is their exoskeleton
The outer covering of the eyeball is cornea.
Bat is a mammal, so it's outer covering is hair whereas bird's outer covering is feather.