| A | B |
|---|
| Functions of the skeletal system | support, protection, movement, electrolyte balance, acid base balance, blood formation |
| The shaft of the bone | diaphysis |
| Ends of the bone | epiphysis |
| Covering of bone | periosteum |
| Lines the internal marrow cavity | endosteum |
| Stem cells that give rise to most other bone cells | osteogenic cells |
| Bone forming cells | osteoblasts |
| Bone dissolving cells | osteoclasts |
| Inorganic matter of bone | hydroxyapatite (85%), calcium carbonate (10%) |
| The basic structural unit of bone | osteon |
| Spongy bone contains of lattice like network of spicules called ________ | trabeculae |
| Type of ossification that produces the flat bones of the skull, most of clavicle and part of the mandible | intramembranous |
| Type of ossification that produces most of the bones in the body | endochondral |
| Which ossification center occurs in the diaphysis | secondary ossification center |
| During bone growth, what zone is there chondrocytes beginning to enlarge | zone of cell hypertrophy |
| States that the architecture of a bone is determined by the stress placed upon it | Wolffs law of bone |
| Bone growth in diameter and thickness | appositional growth |
| A calcium deficiency | hypocalcemia |
| A calcium excess | hypercalcemia |
| Hormone secreted when blood calcium is too high | calcitonin (thyroid gland) |
| Hormone secreted when blood calcium too low | parathyroid hormone (parathyroid gland) |
| A form of vitamin D produced by the kin, liver and kidneys; helps with calcium absorption | calcitriol |
