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1 a combination of the circulatory and respiratory systems.
2 the system that includes lungs, trachea, and diaphragm.
3 the system that breaks down food for nutrients for the body
4 the body system consisting of bones, cartilage and tendons of the body
5 the system that sends messages to the brain to respond to
6 large sacklike structure for breathing
7 created in the marrow of the bone and carries oxygen from the lungs of the body.
8 main structure of the circulatory system
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