The skeletal system protects internal organs, provides support for the body, attachment site for muscles
Bone marrow is the flexible tissue in the interior of bones Bone marrow is also a key component of the lymphatic system, producing the lymphocytes that support the body's immune system.
yellow marrow - bone marrow that is yellow with fat; found at the ends of long bones in adults
An osteoclast is a type of bone cell that resorbs boney tissue. This function is critical in the maintenance and repair of compact skeletal bones Osteoclasts lie in a small cavity called How ship's lacunae, formed from the digestion of the underlying bone.
An osteocyte, a star shaped cell, is the most commonly found cell in mature bone and can live as long as the organism itself. Although osteocytes are relatively inert cells, they are capable of molecular synthesis and modification, as well as transmission of signals over long distances, in a way similar to the nervous system. Osteocytes are thought to be mechanosensor cells that control the activity of osteoblasts and osteoclasts within a basic multicellular unit (BMU), a temporary anatomic structure where bone remodeling occurs.
There are a number of reasons why broken bones hurt: the nerve ending that contain fibers are irritated, broken bones bleed and the blood and swelling causes pain, muscles surrounding the area may spasm as a result of trying to hold the fermented bones together. injuries are based on the location of the injury on the bone, how the bone fragments are aligned, and whether any complications exist.
skeletal system
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