What is periosteum?

bones are not bare in the human body. Instead, there is a membrane that obscures or line, most of the bones of the human body called periosteum. It balances the outer part of each bone with one exception: missing on the joints of long bones of the body. These bones include femur, tibul, humeri and radii; Ulna, metacarples, metatars and phalanxes are also considered long bones. Bones also have a lining called endosteum; The periosteum that covers the bones of the skull is called pericranium. It is divided into two separate layers. The outer layer is called a fibrous layer. contains cells that synthesize collagen and the extracellular part of body tissue. These cells are also important in wound healing.

The inner layer of periostea is called a layer Cambium . This layer contains cells called cell progenitor that can turn into osteoblasts that are cells responsible for growth and bone formation. These cells can also be important in healing. For example, when the boneI break, these cells turn into osteoblasts and another type of cell called chondroblasts that form cartilage cells. This differentiation of cells is an important part of the healing process.

Periosteum has blood vessels and nerves. Blood vessels provide vital nutrition of bones. Nerves give the bones a feeling or feeling. For example, in Perioste are nociceptors. Nociceptors are sensory receptors that send signals to the brain and spine when there is a dangerous form of stimulation. The transmission of these nerve signals often leads to pain perception.

When displaying periostea, it may seem likely that this membrane only rests on the bone. Howevehm, it's not. In fact, it is attached to the bone of the fibers, which are referred to as Sharpey's fibers. In fact, these fibers are connective tissue configurations that contain associated collagen fibers.