Bone Cell Essay

1214 Words Apr 26th, 2012 5 Pages
Bones support, move, and protect the body; they also give us our features. But without bone cells we would have no bones. Bone cells are the living units that make up your bones and keep them functioning. Bone cells have two major roles, which are the production of new bones and resorption or destruction of old bone. They also carry out other small roles. There are four main types of bone cells: Osteogenic, which are bone cells that respond to traumas, osteoblasts, which form bone matrix around themselves by laying down collagen fibers and depositing the hard mineral material, osteocytes, which respond to the bodies need for lower or higher circulating level of minerals contained in the bone and osteoclasts, which break down bone tissue. …show more content…
Third it processes different secretory products in the cell, which are packaged in granules or vesicles. And finally it is responsible for forming lysosomes, which are the recycling centers of the cell. (Shipman, Walker, and Bichell 22) Osteogenic cells (see Figure 1) are precursor cells that begin from mesenchyme and are found near the surface of the bone. Mesenchyme is embryonic connective tissue. Osteogenic cells are capable of mitotic division. Mitotic division is when the nucleus of a cell divides to generate two nuclei with the same number of chromosomes as the original nucleus. The ostegenic cells give rise to bone forming cells called osteoblasts and bone destroying cells called osteoclasts. The bone forming cells called osteoblasts (see Figure 2) “form bone matrix around themselves by laying down collagen fibers and depositing the hard mineral material” (Cole 457). Oseoblasts also produce procolagen, which becomes (collagen) bone. Other cells produce procollagen but they do not become bone. Sometimes mesenchymal cells will attach themselves to the surface of dead trabeculae, where they are transformed into osteoblasts and sometimes osteoclasts. Recently discovered, osteoblasts act as functional niche cells capable of directly regulating stem cell activity. By taking osteoblasts from normal mice and from mice treated with drugs designed to cause stem cell to proliferate and

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