BIOL 2013 Lecture Notes - Lecture 5: Osteoporosis, Pituitary Gland, Muscular Development
Document Summary
Introduction: functions of the skeletal system (continued) leverage, muscles pull on the bones to produce movement protection, ribs protect heart and lungs, skull protects the brain, vertebrae protect the spinal cord, pelvic bones protect the reproductive organs. Structure and function of bone: bones (osseous tissue, outer lining, called the periosteum. Structure and function of bone: the cells of mature bone, osteocytes, mature bone cells, maintain the protein and mineral content of the matrix, cause the release of calcium ions from the bone to the blood. Structure and function of bone: the cells of mature bone, osteoblasts. Immature bone cells: produce osteoid, which is involved in making the matrix, osteoblasts are involved in making new bone. Structure and function of bone: the cells of mature bone (continued, osteoclasts, multinucleated cells, secrete acids, which dissolve the bones thereby causing the release of stored calcium ions and phosphate ions into the blood.
