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  1. Trachea and major bronchi of lungs. respiratory system
  2. Human anatomy, artwork
  3. Digital illustration of nose and nasal sinus anatomy
  4. Lung tissue, TEM
  5. Lung blood vessels
  6. Pulmonary veins and arteries. circulation, cardiovascular system
  7. Coronary Artery Bypass
  8. Lungs in situ - anterior view. respiratory system
  9. Human body with internal organs, nervous system, lymphatic system and circulatory system
  10. Heart
  11. Right lung - medial view. respiratory system
  12. Human upper body showing bones, lungs and circulatory system
  13. Respiratory tract, artwork
  14. Red Blood Cells, SEM
  15. Heart and neck blood vessels
  16. Conceptual image of human lungs and rib cage
  17. Cranial nerves
  18. Heart and lung anatomy, 17th century
  19. Red Blood Cells, SEM
  20. Lung blood vessel nerves, 1844 artwork
  21. Red Blood Cells, SEM
  22. Heart with arteries showing cholesterol in one and plaque in the other
  23. Lungs