What is the largest muscle in the body?

Appeared in: Bihar CHO - 2021

Explanation

The Gluteus Maximus is the largest and most superficial muscle in the gluteal region, giving the buttocks their characteristic shape.
It is considered the largest muscle in the body by mass and volume.
Its primary function is the powerful extension of the hip joint, essential for activities like climbing, running, and rising from a sitting position.
It also plays a key role in maintaining an upright posture.

Option A: The Sartorius is the longest muscle in the body, not the largest by mass or volume. It is a long, thin, ribbon-like muscle.
Option C: The Quadriceps Femoris is a large group of four muscles (Rectus Femoris, Vastus Lateralis, Vastus Medialis, and Vastus Intermedius) on the front of the thigh. While it is a very powerful and large muscle group, it is not a single muscle.
Option D: The Triceps Brachii is the large muscle on the back of the upper arm. It is significantly smaller than the muscles of the lower limb like the Gluteus Maximus.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the muscular system, specifically identifying the largest muscle in the human body as background academic context rather than a clinical decision trigger.
The gluteal region is a common site for administering intramuscular (IM) injections because the large muscle mass allows for good absorption of medications.
Nurses must use caution to avoid the sciatic nerve when giving injections in the dorsogluteal site. The ventrogluteal site (using the gluteus medius) is often preferred as it is free of major nerves and blood vessels.
Weakness or atrophy of the gluteus maximus can lead to an altered gait and difficulty with functional movements like climbing stairs.

How to Approach the Question

This is a factual recall question from anatomy.
First, identify the key term in the question: 'largest muscle'.
Differentiate between 'largest' (by mass/volume) and 'longest' (by length).
Evaluate the options: Recall or deduce the location and relative size of each muscle.
Sartorius is known as the longest muscle.
Quadriceps is a group of muscles, not a single muscle.

Concept Tested & Keywords

Concept Tested: Anatomy of the muscular system, specifically identifying the largest muscle in the human body.
Stem keywords: largest muscle, body
Lead-in keywords: What is

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Practise the full Bihar CHO - 2021

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