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stresses of gravity and muscle pull on the skeleton
Osteoclasts are the cells that breakdown bones by releasing enzymes and resorbing the bones. This sounds negative but it's actually very important for bone health because it allows your bones to be remodeled. About 10% of adult bones are remodeled in a year; in the first year of life, almost 100% of the skeleton is remodeled and replaced.
Osteoporosis refers to a loss of bone mass in which the bones become porous and fragile. Our bones are constantly being remodeled, with bone tissue being broken down and rebuilt on a regular basis. Bone density (the degree of mineralization of the bone matrix) usually increases until about the age of 30, but after that, trouble can begin.
The cells that produce the collagen and inorganic salts of bone matrix are osteocytes. Osteocytes maintain the protein and mineral content of the bone matrix. Osteogenesis is the production of new bone matrix.
Hydroxyapatite is what makes the matrix of bone hard.
The organic matrix elements of a bone are primarily collagen. This allows the bone to flex.
Bone.
Bone cells are called osteocytes, and the matrix of the bone is made of calcium salts and collagen. Bone tissue is the major structural and supportive connective tissue of the body.
Bone cells that liquefy the bone matrix and release calcium into the blood are called Osteoclasts. Immature or matrix depositing bone cells are called osteoblasts.
The matrix consist of fibers and ground substances that determines the character of the matrix, which in turn difines the kind of connective tissue.
osteoblasts
The ongoing process of tearing down and rebuilding bone matrix is called osteoclasts.