The.............is the largest bone in the human body?

Appeared in: JODHPUR AIIMS SNO-2018

Explanation

The femur, located in the thigh, is correctly identified as the largest bone in the human body.
It is also the longest and strongest bone, playing a crucial role in supporting body weight and enabling locomotion.
Its size and strength are essential for withstanding the forces generated during activities like walking, running, and jumping.

Option A: The sternum, or breastbone, is a flat bone located in the center of the chest. While important for protecting thoracic organs, it is not the largest bone by length or overall size.
Option B: The tibia is the main bone of the lower leg (shin bone). It is the second-largest bone in the body, but it is shorter and less massive than the femur.
Option D: The stapes is a tiny, stirrup-shaped bone located in the middle ear. It is, in fact, the smallest and lightest bone in the human body, responsible for transmitting sound vibrations.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the Human Skeletal System as background academic context rather than a clinical decision trigger.
Femur fractures are severe injuries that can lead to significant blood loss and complications, requiring immediate medical attention and often major surgery. The femoral neck is a common site for fractures in the elderly, often referred to as a 'hip fracture'.
The femur contains a large amount of bone marrow, making the iliac crest (part of the hip bone, near the femur) a primary site for bone marrow biopsy and donation for treating conditions like leukemia.
What if the question asked for the largest bone in the upper body? The answer would be the humerus, the bone of the upper arm.

How to Approach the Question

This is a factual recall question based on basic human anatomy.
First, read the question carefully to identify the specific characteristic being asked for: 'largest bone'.
Next, evaluate each option based on your knowledge of the skeletal system.
Recall or deduce the relative sizes: The femur is the thigh bone, the tibia is the shin bone, the sternum is the breastbone, and the stapes is in the ear.
Compare these bones. The thigh bone (femur) is known to be the longest and strongest. The stapes is famously the smallest. The tibia is large but smaller than the femur. The sternum is flat, not long.
Select the option that correctly identifies the largest bone, which is the femur.

Concept Tested & Keywords

QmhykYbz6laHA2n4sMnYXl

E6 Anatomy BDChaurasia V2 10e Part 1 p. 36-38

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