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        | Studies the structure of body parts and their relationships to one another |  | 
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        | The function of the body, in other words, how the body parts work and carry out their life-sustaining activities. |  | 
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        | visible to the naked eye. Examples: Heart, Lungs, Kidneys
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        | subdivision of developmental anatomy  that concerns changes that occur before birth |  | 
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        | Levels of Structural Organization |  | Definition 
 
        | 1. Chemical - atoms combine to form molecules such as water and proteins. molecules form organelles
 2. Cells are formed by organelles
 3. Tissues are formed by cells
 4. Organs are formed by tissues.
 5. Organ systems are formed by organs  that work together to accomplish a common purpose.
 6. Organisms are formed by organ systems
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