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TRUE OR FALSE

15. DEOXYGENATED BLOOD IS BLOOD RICH IN OXYGEN
16. DURING RESPIRATION, A PERSON INHALE AND EXHALE
17. ARTERIES ARE THICK- WALLED AND ELASTIC
18. THE BLOOD IS MADE UP OF PURELY LIQUID MATERIALS
19. THERE ARE ABOUT SIX LITERS OF BLOOD IN THE HUMAN BODY
2O. THE HEART AND LUNGS WORK WELL DURING COMPLETE CIRCULATION ​