Posts Tagged ‘What is the bone?’
What is the bone?
The human skeleton consists of 206 bones, not counting the teeth. The bone is formed by a living tissue that forms the human skeleton next to the cartilage. Numerous functions that are detailed in the following article.
1. Key Features
Bones. The human skeleton consists of 206 bones, not counting the teeth. The bone is formed by a living tissue that forms the human skeleton next to the cartilage. Bone tissue has three basic components: mineral, organic matrix and bone cells.
Bone provides shape and support the body, protect internal organs against trauma, provides locomotion and acts as a storage place of minerals, especially calcium and phosphorus, which in turn can be released to maintain fluid balance body. It also provides bone marrow is essential for the development and storage of blood cells.
The human skeleton consists of 206 bones, not counting the teeth: 80 axial bones which include the bones of the head, face, hyoid, auditory, trunk, ribs and sternum, and 126 appendicular bones, including those of arms, shoulders, wrists, hands, legs, hips, ankles and feet.
There are two types of bone:
- Cortical or compact. It forms the outer layer and hardest bones, but most are in the diaphyseal (middle part) of long bones. Accounts for 80% of bone mass. Provides protection, support and resists the efforts that occur in the movements.
- Trabecular or spongy. Forms the major part of the vertebral body, the epiphyses (ends) of long bones and is present elsewhere. It consists of a network called lamellae arranged in trabeculae, within each trabecula cells are directly receiving nutrients from the blood flowing through the marrow cavities. It is the most active metabolic skeleton.