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6 Unit 5
Human Body Systems
| Term | Definition |
|---|---|
| tissue | similar cells that perform the same functions are grouped together |
| organ | a body structure composed of different kinds of tissues that work together |
| organ system | a group of organs that work together, performing major functions |
| stimulus | any change or signal in the environment that can make an organism react in some way |
| response | an action or change in behavior that occurs as a result of a stimulus |
| digestion | the process by which your body breaks down food into small nutrient molecules |
| circulatory system | body system that transports nutrients and other life-sustaining resources including oxygen as well as removes waste produces and fights off diseases |
| artery | a blood vessel that carries oxygen-rich blood away from the heart |
| capillary | blood vessel as small as a single cell in width where substances are exchanged between the blood and body cells |
| vein | blood vessel that carries deoxygenated blood back to the heart |
| bronchi | two passages that direct air into the lungs |
| alveoli | tiny thin-walled sacs of lung tissue where gases can move between air and blood |
| brain | part of the central nervous system (CNS) that is located in the skull and controls most functions of the body; one of the most important organs of the body |
| spinal cord | a thick column of nervous tissue that links the brain to most of the nerves that branch out through the body; protected by the vertebral column |
| reflex | an automatic response that occurs without conscious control |
Created by:
muellershauna
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