| Term | Definition |
|---|---|
| Anatomy | The study of a body's structure |
| Cells | Basic units of all life |
| DNA | A long molecule found in a cell's nucleus that contains the instructions for making and operating a cell. |
| Pathogen | A tiny, disease-carrying organism |
| T Lymphocytes | Protector cells that destroy cells that have been invaded by viruses |
| B Lymphocytes | Protector cells that respond to pathogens and release antibodies to disable pathogens |
| Tendon | Tissue that connects muscle to bone |
| Voluntary Muscle | Muscles that function when you consciously decide to move them |
| Involuntary Muscle | Muscles that function or contract without you thinking about it |
| Ligaments | Elastic bands that connect two bones |
| Cardiac Muscle | Involuntary heart muscle |
| Smooth Muscle | Involuntary muscle found inside hollow organs |
| Skeletal Muscle | Voluntary muscle that pulls on the bones of the skeleton to make them move |
| Plane Joints | Joints with bones that slide over on another, such as in wrists and ankles |
| Hinge Joints | Joints that allow bending and straightening of the knees, fingers, and elbows |
| Ball and Socket Joints | Joints that involve one bone fitting into another bone |
| Pivot Joints | Joints that involve one bone swiveling around the other |
| Nerve Impulses | High-speed electrical signals that travel along neurons to send messages to the brain |
| Reflex | An automatic, split-second response to our environment that occurs when a message travels to the spinal cord and straight back to our body so we react accordingly |
