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LT 2a and 2b
Levels of Organization and Body Systems
| Term | Definition |
|---|---|
| cell | the smallest, most basic unit of life |
| tissue | a group of cells working together to do a specific job |
| organ | a group of tissues working together to do a specific job |
| organ system | organs that have specific jobs and work together with other organs |
| organism | organ systems working together to make a living thing |
| digestive system | this system is responsible for digesting food and absorbing nutrients |
| respiratory system | this system breathes in oxygen that the body needs and breathes out the waste carbon dioxide |
| cardiovascular system | also known as the circulatory system - this system is responsible for transporting nutrients and waste throughout the body |
| excretory system | also known as the urinary system - this system collects and removes waste from the body |
| muscular system | this system allows the body the move and maintain posture |
| skeletal system | this system supports and protects the body |
| nervous system | this system includes the brain and spinal cord |
| immune system | also known as the lymphatic system - this system protects the body from disease |
| internal | happening on the INSIDE |
| external | happening on the OUTSIDE |
| stimulus | an internal or external change that causes a reaction |
| response | the reaction to an internal or external change |
| homeostasis | the ability of living things to maintain stable, internal conditions |
| nervous system | this system collects stimulus from different parts of the body and controls the body's response |
| excretory system | this system includes the kidneys, bladder, and colon |
| muscular system | this system includes skeletal (biceps, gluteus maximus), cardiac (heart), and smooth (stomach, intestines) varieties |
| digestive system | this system includes the stomach, liver, and intestines |
| skeletal system | this system includes bones, joints, and ligaments |
| respiratory system | this system includes the lungs and windpipe |
| cardiovascular system | this system includes the heart, blood, veins, arteries, and capillaries |
Created by:
mrsbrownsc
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