How many lobes are there in the liver?

Appeared in: MP CHO -2019 (Shift-2)

Explanation

The human liver is anatomically divided into four distinct lobes based on external surface features.
As seen in the provided image and confirmed by anatomical texts, these lobes are the large right lobe, the smaller left lobe, the caudate lobe (posterior), and the quadrate lobe (inferior).
The falciform ligament visibly separates the right and left lobes on the anterior surface.

Option A: The liver is a single, complex organ, but it is structurally divided into multiple lobes. It is not a single, undifferentiated mass.
Option B: This number represents the two functional lobes of the liver, which are defined by their separate blood supplies and biliary drainage systems (divided by Cantlie's line). The question asks for the number of lobes in general, which typically refers to the anatomical count.
Option C: There is no standard anatomical or physiological classification that divides the liver into three lobes.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the liver lobes as background academic context rather than a clinical decision trigger.
Understanding the four anatomical lobes is fundamental for nurses to correctly interpret physical examination findings, understand imaging reports (like CT or ultrasound), and communicate effectively about a patient's condition.
Knowledge of liver segmentation (the 8 Couinaud segments) is even more critical in surgical and oncology nursing, as tumor locations and resections are described by segment number (e.g., 'lesion in segment VI').
What if? If a surgeon's note mentions a resection of the quadrate lobe, a nurse would know this involves the area near the gallbladder (anatomically, segment IVb), and would monitor for potential complications related to the biliary system.

How to Approach the Question

This is a factual recall question testing basic anatomical knowledge.
Identify the core subject of the question: the number of lobes in the liver.
Recall the standard anatomical structure of the liver. If you can, visualize a diagram showing its different parts.
Differentiate between the major anatomical division (based on visible landmarks) and the functional division (based on blood supply). Unless specified, 'lobes' usually refers to the anatomical count.
The liver has four anatomical lobes: right, left, caudate, and quadrate.
Select the option that matches this number.

Concept Tested & Keywords

Q4IqSGOBZLfwN3d_2RNnkg

E6 Anatomy BDChaurasia V2 10e Part 2 pp. 86-88, 83-85

Practise the full MP CHO -2019 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.