Axial skeleton consists of:

Appeared in: Raj. CHO -2024

Explanation

The axial skeleton forms the central core or axis of the human body.
It is composed of the bones of the head (skull) and trunk (vertebral column, ribs, and sternum).
Its primary function is to provide support and protect vital organs such as the brain, spinal cord, heart, and lungs.
This option is the only one that lists all the major components of the axial skeleton.

Option A: This option is incomplete as it omits the sternum (breastbone), which is a key component of the thoracic cage and part of the axial skeleton.
Option B: This option is significantly incomplete. It leaves out the entire thoracic cage, which consists of the ribs and sternum.
Option C: This option is incomplete because it excludes the skull, which houses the brain and is a fundamental part of the axial skeleton.

Visual 1: Diagram - A diagram of the full human skeleton with the axial skeleton (skull, vertebral column, ribs, sternum) highlighted in a distinct color to differentiate it from the appendicular skeleton.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Components of the Axial Skeleton as background academic context rather than a clinical decision trigger.
The sternum is a critical landmark for performing chest compressions during cardiopulmonary resuscitation (CPR). Correct hand placement on the sternum is vital for effective CPR and to avoid injury.
Protecting the vertebral column is a priority in trauma patients to prevent injury to the spinal cord, which can lead to paralysis or death.
What if? If a patient has a suspected cervical spine injury, the first nursing action is to ensure immobilization of the head and neck (part of the axial skeleton) to protect the spinal cord within it.

How to Approach the Question

This is a factual recall question from the subject of Anatomy.
First, identify the key term in the question: 'Axial skeleton'.
Mentally recall the two main divisions of the human skeleton: the axial and the appendicular skeleton.
Remember the components of the axial skeleton, which forms the central axis of the body.
Evaluate each option to determine which one provides the most complete and accurate list of these components.
Eliminate the options that are incomplete. The correct option must include the skull, vertebral column, ribs, and sternum.

Concept Tested & Keywords

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Practise the full Raj. CHO -2024

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