We give plants carbon dioxide and - plants give us oxygen, The skeletal system - gives support to the body, The muscular system - moves the entire body, The nervous system - sends messages and signals to and from the brain., The respiratory system - takes in oxygen and releases carbon dioxide, Plants need - carbon dioxide while animals (humans) need oxygen, The circulatory system - delivers oxygen, blood, lymph and nutrients through the blood to the body, The cardiovascular system - another term for circulatory system that supplies oxygen to the body., cells make tissues and tissues make organs - and organs make body systems, The digestive system - breaks down food into tiny particles,

Body Systems

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