| calcitonin | | secretion of this hormone occurs with/after elevated levels of calcium |
| calcium | | Cells that dissolve bone matrix and work in remodeling of bone |
| periosteum | | needed for absorption of calcium and phosphate ions |
| protein crystal | | cartilage forming on a long bone |
| closed | | found in spongy bone and are aligned along the stress lines of the bone |
| remodeling | | medullary cavity of bones contain |
| metaphysis | | Needed to prevent osteoporsis (2 vitamins and one mineral |
| marrow | | the strenght in bones that gives it 'flexibility' |
| osteocyte | | structural units of compact bone |
| osteons | | mature bone cell and most abundant cell in bone |
| hyaline cartilage | | accounts for 2/3 the weight of a bone |
| trabeculae | | found in center of osteons |
| closure | | a break in the bone that is completely enclosed |
| vertebrae | | the deposition of calcium in bones |
| osteoclasts | | occurs when osteoclasts are more active than osteoblasts |
| lacuna | | small, narrow passage ways containing the cytoplasmic extentions of osteocytes |
| exercise | | elevated levels of estrongen causes________________of the epiphyseal plate |
| ossification | | our bones are constantly_____________________, according to the demands we put on them |
| blood vessels | | structure responsible for bone growth |
| canaliculi | | Cells that secrete organic components of the bone matrix |
| vitamin D | | The region of the bone between the end and the shaft |
| trabeculae | | gives bone flexibility, strength and resistance to shattering |
| osteopenic bones | | most abundant mineral in the body |
| Vitamin C D and Calcium | | prior to puberty elevated growth hormone causes_______________ |
| endosteum | | cartilage model |
| tensile strenth | | bone built to withstand stress from many directions |
| 10-15 | | membrane on outer surface of bone |
| osteoblasts | | contains osteocytes and referred to as 'little lake' |
| calcium-phosphate | | the femur can withstand up to _____-_____times the body weight with out breaking |
| epiphyseal plate | | lining of the medullary cavity |
| endochondral ossification | | Irregular shaped bone |
| sesamoid bones | | _____________great for the bones and increases width and density. |
| giantism | | develop within the tendons |
