The Human Body Systems

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Across
  1. 2. The main organ that is in the respiratory system.
  2. 4. pumps deoxygenated blood in and oxygenated out.
  3. 6. A system that brings air into and out of the lungs to absorb oxygen and remove carbon dioxide.
Down
  1. 1. A system that circulates blood from the heart to the rest of the body.
  2. 3. System to absorb nutrients and remove waste.
  3. 5. A humans physical structure, including the bones, flesh, and organs.
  4. 7. The fluid that transport nutrients and other things.