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Which valve guards the opening between the left atrium and the left ventricle?
AThe tricuspid valve
BThe pulmonary valve
CThe mitral valve
DThe aortic valve
Answer & Solution
Correct answer: C. The mitral valve
1. The left atrioventricular opening has its own guardian valve.
2. The opening between the left atrium and ventricle is guarded by the mitral valve.
3. The tricuspid is its right-side counterpart, a frequent exam confusion.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.1 Heart Anatomy_
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