Cardiovascular System

12345678910111213
Across
  1. 3. infarction technical term for heart attack
  2. 4. veins These take carbon dioxide and other waste material from the heart muscles to the heart
  3. 5. semilunar valve Controls blood entering the lungs
  4. 7. single cell thick vessels that connect the arterial and venous system
  5. 9. A hollow organ made up of cardiac muscle
  6. 10. Fibers Branches of nerves from the Bundle of His
  7. 12. Thin walled tubes that allow the body to return de-oxygenated blood from the body to the heart
  8. 13. Blood flow through the tissues is called
Down
  1. 1. systole Atrial contraction is called
  2. 2. arteries supply the heart muscles with oxygen and nutrients
  3. 3. middle and thickest layer; made up of cardiac muscle
  4. 5. Establishes the basic rhythm of the heart
  5. 6. De-Oxygenated blood flows from this and into the right atrium
  6. 8. semilunar valve Controls blood entering the arterial system
  7. 11. Oxygenated blood leaves the heart by the