NURS 106 Lecture Notes - Lecture 7: Sesamoid Bone, Osteopenia, Dermis
17 Sep 2018
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Document Summary
Support - serves as the body"s main infrastructure. Storage of minerals - calcium salts (holds 98% of the body"s calcium ) Blood cell production - bone marrow produces new blood cells. Protection - many delicate organs (such as the brain, heart, lungs) are surrounded. Leverage - muscle pulls in bone to produce movement. Cinderella cells (clean) giant multinucleated cells performs osteolysis (breakdown of the bone matrix, increasing calcium and phosphate concentrations in blood ) Bone matrix - heavy, solid part of bone made up primarily of calcium . Balance work between the osteoblasts (matrix formation) and osteoclasts (breaking down matrix) in order for bone to be healthy and calcium/phosphate concentrations in the bloodstream to be optimal. Compact bone consists of osteons (like strong straw), the functional unit of the compact bone. Makes up long shafts of long bones found in areas that faces multi-directional stresses (e. g. femur, humerus) dense solid portion of the bone.
