| Term | Definition |
|---|
| Lens | A small flexible structure that focuses light on the retina and lies directly behind the iris |
| Ligament | Tissue that connects a bone to other bones or to cartilage and helps to support joints. |
| Marrow | A tissue that fills many bones and makes most blood cells including disease-fighting white blood cells |
| Medulla | The part of the brain that controls many of your body's involuntary muscle movements that you do not have control over. |
| Muscle | Tissue that works with the skeleton to make movement possible |
| Nearsighted | a condition in which one can see nearby; but not faraway; objects claerly |
| Nerves | The specialized cells or bundled fibers that send signals from one body part to another |
| Scapula | One or two large, flat triangular bones in your back that helps your arms be flexible, or move easily, also known as shoulder blade |
| skull | 22 bones; 14 of these, including the jaw, cheek, and nose bones are called facial bones; the remaining eight bones beneath the forehead and scalp are known as the cranium. |
| Spinal column | Also called the backbone, a chain of vertebrae that surrounds and protects the spinal cord |
| Sternum | Bone in the center of your chest, that connects the ribs; also known as the breastbone |
| tendon | A fibrous cord that holds the skeleton together and aids in movement and exercise |
| Tibia | The larger of the two bones in the lower leg that run from knee to the ankle |
| Vertebrae | Bones that make up the spinal cord |
| Voluntary muscle | A muscle that you can consciously move. |
| Ribcage | A term for the ribs, collectively |
| Ribs | Bones that curve around the torso from your back to your chest and surround and protect your lungs and heart |
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