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The Human Body-Vocab
MBtP 9-11 Concept 4 Unit 3
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 |