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dgangell skel/musc
| Question | Answer |
|---|---|
| Vertebra | segment of the backbone; encloses and protects the nerve cord |
| Cartilage | type of connective tissue softer than bone |
| Marrow | specialized tissue found in bone; yellow bone marrow consists of stored fat that serves as an energy reserve; red bone marrow makes cells that develop into blood cells |
| Joint | area where one bone meets another |
| Ligament | strong fibrous connective tissue that holds together the bones in movable joints |
| Arthritis | group of skeletal disorders characterized by inflamed joints |
| Osteoporosis | Disorder in which bones become thinner, more porous, and more easily broken |
| Tendon | Dense connective tissue that attaches a muscle to a bone |
| Muscle Fiber | single, long cylindrical muscle cell containing many nuclei |
| Myofibril | unit of muscle fiber made up of smaller units that contract |
| Sarcomere | Unit of contraction in a muscle fiber |
| Actin | twisted, thin filament in a muscle fiber |
| Myosin | Thick filament in a muscle fiber; has bump-like projections |