Yes, bones definitely have cells! In fact, bone tissue is alive and dynamic, constantly being remodeled and repaired. It's not just a static, inert structure.
Types of Bone Cells
Bone is a specialized connective tissue containing four main types of cells:
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Osteoblasts: These are bone-forming cells. They synthesize and secrete the components of the bone matrix, a process called ossification or bone formation. Think of them as the bone builders. 1, 2, https://my.clevelandclinic.org/health/body/24871-osteoblasts-and-osteoclasts
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Osteocytes: These are mature bone cells that reside within the bone matrix. They maintain bone tissue and play a crucial role in sensing mechanical stress on the bone. They're like the bone maintainers. 1, 2, https://pmc.ncbi.nlm.nih.gov/articles/PMC3341892/
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Osteoclasts: These are large, multinucleated cells responsible for bone resorption – the breakdown of bone tissue. This process is essential for bone remodeling and repair. They are the bone recyclers. 1, 2, https://pmc.ncbi.nlm.nih.gov/articles/PMC4515490/
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Bone lining cells: These cells cover the bone surfaces that are not undergoing remodeling. They are thought to help regulate mineral exchange between the bone and the blood. They act as the bone's protective layer. 1, 2, https://pmc.ncbi.nlm.nih.gov/articles/PMC3341892/
The constant activity of these cells ensures that bone remains strong, adaptable, and capable of repairing itself throughout life. Bone marrow, found within some bones, also contains various blood cell-producing stem cells. https://www.mayoclinic.org/tests-procedures/bone-marrow-transplant/in-depth/stem-cells/art-20048117
