Periosteum
calcium
No insect have bones. They have a hard outer covering, but no bones.
Periosteum
bones and internal organs.
its bones
Flat bones
The bones covering the brain are called the cranium as a group. There are eight bones in this group.
It is covered in cartilage
The bones of the skull that form a protective covering of the brain are the frontal, parietal, temporal, occipital, sphenoid, and ethmoid bones. They encase and protect the delicate structures of the brain from external trauma.
Periosteum is the membrane that lines the outer surface of all bones, except at the joints of long bones.
Periosteum is a membrane that lines the outer surface of all bones,[1] except at the joints of long bones.
The specialized connective tissue covering all the bones of the body is called periosteum. It helps in bone growth, repair, and provides nourishment to the bones. Additionally, it contains cells involved in bone formation and regeneration.