Multiple Choice
Which chamber of the heart receives oxygenated blood from the lungs?
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40. Circulatory System
Circulatory and Respiratory Anatomy
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Which of the following statements about the left lung is NOT correct?
A
The left lung is generally smaller than the right lung.
B
The left lung has three lobes.
C
The left lung is divided into superior and inferior lobes.
D
The left lung contains a cardiac notch to accommodate the heart.
Verified step by step guidance1
Step 1: Begin by understanding the anatomy of the lungs. The human lungs are divided into the right lung and the left lung, each with distinct features. The right lung typically has three lobes: superior, middle, and inferior, while the left lung has only two lobes: superior and inferior.
Step 2: Recognize that the left lung is smaller than the right lung. This is due to the presence of the heart, which occupies space on the left side of the thoracic cavity. The left lung has a cardiac notch to accommodate the heart.
Step 3: Review the statement 'The left lung has three lobes.' This is incorrect because the left lung has only two lobes, not three. The right lung is the one with three lobes.
Step 4: Confirm the other statements about the left lung. The left lung is smaller than the right lung, it is divided into superior and inferior lobes, and it contains a cardiac notch. All of these statements are correct.
Step 5: Conclude that the incorrect statement about the left lung is 'The left lung has three lobes.' This is the answer to the question.
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