Question

Which of the following are true about right lung ?
A. It has 1 fissures and 3 lobes.
B. It is shorter and broader than left lung.
C. Anterior border is straight.
D. Absence of lingula.

• A. A, B and C Only
• B. C, D and A Only
• C. B, C and D Only
• D. D, A and B Only

Hint:

Remember the "Rule of 2s and 3s": The Right lung has 3 lobes and 2 fissures. The Left lung has 2 lobes and 1 fissure (plus the Lingula and Cardiac notch).

Answer 1

The Correct Option is C

Step 1: Concept:
This question requires a detailed anatomical understanding of the human respiratory system, specifically contrasting the physical features of the right lung against the left lung.

Step 2: Step-by-step Explanation:

• Statement A is False: The right lung is divided into 3 lobes (superior, middle, and inferior) by 2 fissures (the oblique fissure and the horizontal fissure). The statement incorrectly claims it has only 1 fissure.

• Statement B is True: The right lung is anatomically shorter than the left lung because the right dome of the diaphragm sits higher to accommodate the large liver underneath. However, it is also broader (wider) and has a larger total volume because the heart bulges more into the left thoracic cavity.

• Statement C is True: The anterior border of the right lung is relatively straight and vertical. In contrast, the anterior border of the left lung features a distinct indentation called the cardiac notch to make room for the apex of the heart.

• Statement D is True: The lingula is a small, tongue-like projection of tissue found exclusively on the superior lobe of the left lung (just below the cardiac notch). It is absent in the right lung.

• Since B, C, and D are factually correct anatomical statements, this combination forms the correct answer.

Step 3: Final Answer:
The correct combination of true statements is B, C, and D Only.