The largest organ of the body is?

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2018

Explanation

The skin is definitively the largest organ of the body, based on both total weight and surface area.
In an average adult, it covers a surface of 1.5-2.0 square meters and makes up about 15% of the total body weight.
It forms the body's primary protective barrier against pathogens, UV radiation, and physical injury, and is vital for temperature regulation and sensation.

Option A: The brain, while a large and complex organ weighing around 1.4 kg, is significantly smaller and lighter than the skin.
Option C: This is the most common distractor. The liver is the largest gland and the largest internal organ, weighing up to 1.6 kg, but it is smaller than the skin in both total weight and surface area.
Option D: The kidneys are paired organs that are much smaller than the skin, liver, or brain, with each kidney weighing only about 150 grams.

Clinical Relevance

Nursing practice connection: Knowing Identification of the largest organ in the human body helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A nurse's assessment of the skin (integumentary system) provides critical clues about a patient's hydration, circulation, oxygenation, and nutritional status.
Nurses play a vital role in maintaining skin integrity to prevent pressure injuries (bedsores), especially in immobile patients, which is a key quality indicator in healthcare.
What if the question asked for the 'largest lymphoid organ'? The answer would be the spleen, highlighting the importance of precise anatomical and functional classification.

How to Approach the Question

This is a factual recall question that tests foundational anatomical knowledge.
First, identify the core of the question: 'largest organ'.
Recall the distinction between the largest overall organ and the largest internal organ. This is a common trick in anatomy questions.
The skin is the largest organ by both mass and surface area.
The liver is the largest internal organ.
Evaluate the options based on this distinction. Since the question does not specify 'internal', the correct answer is the largest organ overall, which is the skin.

Concept Tested & Keywords

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E6 Anatomy Applied Ashalatha 4e pp. 497-499, 228-230

E6 Anatomy BDChaurasia V2 10e Part 2 p. 83-85

Practise the full RUHS, Jaipur, PB B.Sc Nursing Entrance-2018

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