The process of calcification only occurs in the presence of collagen fibers. Calcification is the process of deposition of mineral salts on the collagen fiber matrix that crystallizes and hardens the tissue. The mineral salts primarily include hydroxyapatite, a mineral formed from calcium phosphate. It contains specialized cells and a matrix of mineral salts and collagen fibers. For example, spongy bone tissue is found in the inner layer of bones and contains blood vessels to deliver nutrients and remove waster from bone cells.īone, or osseous tissue, is a connective tissue that constitutes the endoskeleton. However, as a student of biology it is important to understand the types of bones and bone tissues as well as their functions because this basic part of anatomy is an excellent example of form follows function. The information in this section is not within the scope for AP ® and does not align with the curriculum framework.
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