Biology · Human Circulatory System
Which one of the following options is INCORRECT about the human circulatory system?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The upper two chambers are called ventricles and the lower ones are called atria.✓
- 2Rhythmic contraction and relaxation of muscles in the heart chambers constitute a heartbeat.
- 3The pulmonary artery carries carbon dioxide-rich blood to the lungs.
- 4The human heart is a four-chambered structure.
Correct answer
The upper two chambers are called ventricles and the lower ones are called atria.
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