Heart

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Across
  1. 4. Type of blood that doesn't contain oxygen
  2. 5. Receives deoxygenated blood from the upper part of the body
  3. 6. Things that prevent backwash of the blood in the heart
  4. 8. One of two large chambers that collect and expel blood received from an atrium
Down
  1. 1. Arteries that are on the surface of the heart
  2. 2. Vein that carries deoxygenated blood from the upper half of the body
  3. 3. Receives deoxygenated blood from the left and right pulmonary veins
  4. 7. A wall dividing the heart into different parts