Biology · Human Circulatory System
A person experiences difficulty breathing and fatigue, and a blood test reveals low oxygen levels. Which part of the circulatory system is most likely malfunctioning?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Veins
- 2Capillaries
- 3Heart valves✓
- 4Lungs
Correct answer
Heart valves
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