Which bone is known as the breast bone?

Appeared in: NORCET 2 - 2021 (shift-1)

Explanation

The sternum is the anatomical name for the breastbone.
It is a flat bone situated in the anterior midline of the chest, forming a key part of the thoracic skeleton.
The sternum consists of three parts: the manubrium (top), the body (middle), and the xiphoid process (bottom).
Its primary functions are to protect the heart and lungs and to provide an attachment point for the ribs via their costal cartilages.

Option B: The ribs are a set of 12 pairs of curved bones that form the rib cage, which encloses the chest. They are not the single bone known as the breastbone.
Option C: A vertebra is one of the 33 individual bones that interlock to form the spinal column (backbone).
Option D: The clavicle is the collarbone. It is a slender bone that connects the sternum to the scapula (shoulder blade).

Visual 1: Diagram - An anterior view of the human thoracic cage, highlighting the sternum and labeling its three parts (manubrium, body, xiphoid process), the ribs, and the clavicles. This helps visualize the relationship between the different bones mentioned in the options.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the Thoracic Skeleton as background academic context rather than a clinical decision trigger.
The sternum is a critical landmark for performing cardiopulmonary resuscitation (CPR). Compressions are applied to the lower half of the body of the sternum to avoid fracturing the xiphoid process, which could damage the liver.
A sternal puncture is a procedure to obtain bone marrow from the sternum for diagnostic purposes, as it is rich in marrow and easily accessible.
What if? If a patient sustains a severe chest trauma from a car accident, a fractured sternum (especially at the sternal angle) is a significant concern. This could indicate potential injury to the underlying heart and great vessels, requiring immediate and careful assessment.

How to Approach the Question

This is a direct recall question testing knowledge of basic human anatomy.
Identify the key term in the question: 'breast bone'.
Recall or deduce the common anatomical name for the breast bone.
Evaluate each option: 'Sternum' is the correct anatomical term. 'Ribs', 'Vertebra', and 'Clavicle' are other distinct bones in the torso and neck area.
Confirm the correct match to answer the question.

Concept Tested & Keywords

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Practise the full NORCET 2 - 2021 (shift-1)

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