Circulatory System

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Across
  1. 1. A waste, made of cells, which the blood carries to the lungs to be exhaled
  2. 2. Fluid that carries oxygen
  3. 5. Carry blood and nutrients to the heart
  4. 6. Open and close, and allow blood to flow in the correct direction
  5. 7. Carry blood and nutrients away from the heart
  6. 8. Main part of the respiratory system
Down
  1. 1. Connect two very important parts of the system
  2. 3. Carried by the blood to make energy
  3. 4. The main organ
  4. 5. A tube through which the blood circulates in the body