The Heart

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Across
  1. 1. Makes up the thick middle layer of the heart
  2. 2. Carries blood from the body back to the heart
  3. 3. Parts of the heart that open and close to let blood flow in the right direction
  4. 4. One of the two large chambers located towards the bottom of the heart
  5. 6. One of the two upper chambers in the heart that receives blood from the circulatory system
  6. 7. Group of cardiac muscle cells that are responsible for generating and regulating the heartbeat
  7. 9. Tissue that separates the left and right sides of the heart
Down
  1. 1. Small blood vessels that deliver nutrients and oxygen to cells throughout the body
  2. 2. Large vein that carries blood to the heart from the rest of the body
  3. 5. A pipeline that carries blood away from the heart
  4. 8. The largest pipeline that carries blood away from the heart