breaks down food into nutrients that the body can use

removes liquid waste from the body and maintains water balance

support system whose bones protect organs, produce red and white blood cells, and work with muscles to produce movement

carries messages to and from the spinal cord and brain and all other parts of the body

carries nutrients, hormones, gases, and cellular wastes throughout the body

provides the body with oxygen and removes carbon dioxide produced as waste

maintains posture and provides motion

fights off pathogens and removes harmful organisms from the blood

covers and protects the body

produces hormones and controls many body activities

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