Bone Cell

1215 WordsMay 8, 20125 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…
“This work provides mechanistic insight into the common process of stem cell mobilization and makes available a new way to discover novel pathways that regulate the expansion of hematopoietic stem cells”. “Additionally, this study establishes a new paradigm for examining more generally how support cell in the body influence stem cell activity” (Bone Cells Found Par 11). Osteoblasts are columnar in shape and their nucleus is located at the end most distant from the bone surface. The function of Osteocytes, (see Figure 3) is to respond to the bodies need for lower or higher circulating level of the minerals contained in the bone. Osteocytes are formed from osteoblasts that have become surrounded or trapped in matrix, and have ceased to make osteoid. The osteoid refers to the organic portion of the bone matrix. Osteocytes have three phases in its life: Formative, resorptive, and degenerative. In the formative phase, the new osteocyte resides in a space, called a lacuna, within either the osteoid or the bony tissue. Since the osteocyte is losing its ability to manufacture osteoids it still has a large Golgi apparatus and endoplasmic reticulum. Although it has few lysosomes it is supplied with a fair amount of mitochondria. “In this phase, the osteocytes develop long, dendritic processes, which reside in bony
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