alleryStart learning →The cardiac notch is found on which lung and why?
AOn the right lung, to seat the aortic arch
BOn the left lung, to make room for the heart
COn the right lung, to make room for the liver
DOn the left lung, to seat the oesophagus
Answer & Solution
Correct answer: B. On the left lung, to make room for the heart
1. The cardiac notch is an indentation on a lung surface.
2. It lies on the left lung.
3. It exists to allow space for the heart, so the second option is correct.
4. Options placing the notch on the right lung fail on both the side and the reason.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.2 The Lungs_
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