The outer layer of the bone is called the periosteum. This membrane layer of the bone is dense and made up of fibrous tissue. It also consists of nerves and blood vessels that provide blood flow to the bone. More »

Cortical bone is a dense and rigid layer of calcium-rich osseous tissue that makes up the outer layer of a bone, explains InnerBody. This compact bone layer is cylindrical in shape with a honeycombed structure, providing... More »

Spiders do not have bones. They are arthropods, and like all such organisms, they have external skeletons that are the primary support for their muscles. Their exoskeletons consist of cuticles with joints in the surface ... More »

The thin, tough membrane that covers bones is known as the periosteum. It typically serves as a protective layer for all areas of a bone, except where cartilage is present. More »

Cortical bone is a dense and rigid layer of calcium-rich osseous tissue that makes up the outer layer of a bone, explains InnerBody. This compact bone layer is cylindrical in shape with a honeycombed structure, providing... More »

The compact bone is made up of a dense layer of calcium and minerals which makes it so hard that surgeons need a saw to cut through it. It is honeycombed with thousands of holes where nerves and blood vessels run, supply... More »

Compact bone is the outer layer of a bone such as the tibia or fibula. Compact bone is also referred to as cortical bone. The compact bone is shaped like a cylinder and is extremely hard. More »