Bones provide support for our bodies and help form our shape. Although they're very light, bones are strong enough to support our entire weight. Bones also protect the body's organs. The skull protects the brain and forms the shape of the face. The spinal cord, a pathway for messages between the brain and the body, is protected by the backbone, or spinal column.
Evolutionary origin and significance
Think back to last Halloween for a minute. Wherever you looked, there were vampires, ghosts, or bony skeletons grinning back at you. Vampires and ghosts don't really exist, but skeletons sure do! Every single person has a skeleton made up of many bones.
About the Show
Bone , rigid body tissue consisting of cells embedded in an abundant hard intercellular material. The two principal components of this material, collagen and calcium phosphate, distinguish bone from such other hard tissues as chitin , enamel , and shell. Bone tissue makes up the individual bones of the human skeletal system and the skeletons of other vertebrates. The functions of bone include 1 structural support for the mechanical action of soft tissues, such as the contraction of muscles and the expansion of lungs, 2 protection of soft organs and tissues, as by the skull , 3 provision of a protective site for specialized tissues such as the blood-forming system bone marrow , and 4 a mineral reservoir, whereby the endocrine system regulates the level of calcium and phosphate in the circulating body fluids.
A bone is a rigid organ that constitutes part of the vertebrate skeleton in animals. Bones protect the various organs of the body, produce red and white blood cells , store minerals , provide structure and support for the body, and enable mobility. Bones come in a variety of shapes and sizes and have a complex internal and external structure. They are lightweight yet strong and hard, and serve multiple functions. Bone tissue osseous tissue is a hard tissue , a type of dense connective tissue. It has a honeycomb -like matrix internally, which helps to give the bone rigidity. Bone tissue is made up of different types of bone cells. Osteoblasts and osteocytes are involved in the formation and mineralization of bone; osteoclasts are involved in the resorption of bone tissue. Modified flattened osteoblasts become the lining cells that form a protective layer on the bone surface.