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HB: Chapter 5
| Term | Definition |
|---|---|
| Bone | A matrix of non-living extracellular crystals of calcium and living osteocytes. |
| Osteon | Rings of osteocytes arranged in a cylinder. |
| Osteocyte | An embedded osteoblast within the matrix it has secreted. |
| Central Canal | Pathway for blood vessels to pass into bone, delivering nutrients to osteocytes. |
| Ligament | Connective tissue, dense and fibrous. Connects bone to bone. |
| Cartilage | Elastic substance that contains fibers of collagen and water. Smooth and flexible, it absorbs pressure at joints and allows for smooth movement. |
| Osteoblast | Cell that builds bone material. |
| Osteoclast | Cell that remodels and repairs bone cells. |
| Osteoporosis | Complication where bone loses a great deal of mass leaving it 'pourous' and weakened. |
| Axial Skeleton | Skull, sternum, ribs and vertebral column. |
| Appendicular Skeleton | Bones of arms, legs and their attachments to the trunk. |
| Synovial Joint | Free movable joint separated by a thin fluid-filled space. |
| Tendons | Connective tissue that joins muscle to bone. |
| Abduction | Movement of a limb away from the body midline. |
| Adduction | Moment of a limb toward the body midline. |
| Circumduction | Movement of a limb in a cone shape rotation. |
| Rotation | Movement of a limb around its own axis. |
| Flexation | Movement that deceases the angle of the joint. |
| Extension | Movement that increases the angle of the joint. |
| Supination | Rotation of the forearm so the palm faces anteriorly. |
| Pronation | Rotation of the forearm so the palm faces posteriorly. |