Skin System, first barrier for protection, regulates body temperature, Respiratory System, exchanges oxygen and carbon dioxide, Circulatory System, moves blood around the body, Digestive System, breaks down food, Skeletal System, supports and protects the body, Muscular System, moves the body and internal organs, Excretory system, removes liquid waste from the body, Reproductive system, produces offspring, Immune system, fights off invaders and disease, Nervous System, controls all body functions

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