Bone tissue is made up mostly of calcium and collagen, which is a protein. The outer layer of bone is hard and dense and called compact or cortical bone. The inner layer is called trabecular or cancellous bone. It is lig... More »

One of the three layers of a bone, compact bone tissue is the rigid, dense outer layer of bone that consists primarily of calcium and minerals. Also called cortical bone, compact bones are so hard that a saw is needed to... More »

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 »

Bone matrix is comprised primarily of collagen, which takes the shape of chains in various sizes and dimensions. Bone matrix is created from various collagens, which are the most abundant proteins in the body. Collagen i... More »

Bone is made mostly of collagen and calcium. This combination works to make the bones strong and flexible at the same time, enabling them to be protective and rebound from stress fractures. More »

Bone marrow is the spongy tissue at the center of large bones responsible for the production of all the various types of blood cells. This includes red blood cells, platelets, and the various kinds of white blood cells. More »

Some of the key functions of protein involve energy production, transportation, boosting the immune system and replenishing body tissue. Proteins are some of the most essential nutrients for human beings, and they can be... More »