Anatomy Criss Cross

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Across
  1. 2. The _________ is located below the lungs.
  2. 10. __________ is the muscular layer of the heart.
  3. 12. The ______________ is composed of three cusps/flaps.
  4. 13. ______________ measure approximately 50 to 100 micrometers in length.
  5. 15. _____ are thin-walled chambers that receive blood from the veins.
  6. 16. Covering the inner surface of the heart wall is the ___________.
  7. 18. The _____________________ are thin structures that are composed of endocardium and connective tissue.
  8. 19. ____________ are key molecular regulators of the contraction.
  9. 20. The heart is located underneath the _______.
Down
  1. 1. Covering the outer surface of the heart is the __________.
  2. 3. The _____________ is composed of two cusps/flaps.
  3. 4. Rising pressure in the pulmonary trunk artery and aorta forces the _______________ to open.
  4. 5. ________ is a displacement of tissue/organ from its normal position.
  5. 6. Cardiac muscle cells are called ___________.
  6. 7. __________ pumps blood out of the heart.
  7. 8. The _______ expands the volume of the chamber.
  8. 9. An elastic artery called the _____.
  9. 11. Surrounding the heart is a fibrous sac called the ___________.
  10. 14. The _______ is the control center of a cell.
  11. 17. ________ is relaxation.
  12. 18. The narrow end of the heart is called the _____.