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Bone or Osseous Tissue - Spongy(cancellous bone-loosely...

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Skeletal System Bone or Osseous Tissue * Connective tissue in which the matrix is hardened by the deposition of calcium phosphate and other minerals. * Mineralization or calcification- the hardening of bone. Functions * Support * Protection * Movement * Mineral storage and homeostasis * calcium and phosphorus * Blood production - red bone marrow * Storage of energy * yellow bone marrow contains mostly adipose tissue * Electrolyte balance-buffers blood against excessive pH changes by absorbing or releasing alkaline salt * Detoxification- removes heavy metals and other foreign elements from the blood, thus reducing their effects on the nervous and other tissue. Types of Bones Classified into four types according to shape * Long- * Short * Flat * Irregular Two types classified according to location * Sutural (Wormian) bones - small bones between joints of cranial bones * Sesamoid bones - small bones located in tendons (knee caps) Bone According to Structure * Compact bone- dense osseous tissue
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Unformatted text preview: * Spongy (cancellous) bone-loosely organized osseous tissue found at the ends of long bones and in the middle of most others. Parts of Long Bones * Diaphysis- the shaft or long main cylindrical portion * Epiphysis- the ends * Metaphysis- the region where the diaphysis joins the diaphysis * Articular cartilage- thin layer of hyaline cartilage covering the epiphysis * Periosteum- tough white fibrous membrane around the surface of the bone not covered by the articular cartilage * consist of dense, irregular connective tissue, blood vessels, and nerves that pass into the bones * medullary cavity- central part of the bone, also called the marrow cavity because it contains the bone marrow. * Endosteum- the lining of the medullary cavity that consists of osteoprogenitor cells and osteoclasts. * Nutrient foramina-minute hole through which blood vessels enter the bone. Skeletal System...
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