The organ enclosed in a bony cavity formed by cranial bones is:

Appeared in: IGNOU PB Bsc Nsg.Entrance-2026

Explanation

The brain is the primary organ located within the cranial cavity.
The cranial cavity is a protective space formed by the eight cranial bones of the skull.
This bony enclosure is crucial for protecting the delicate brain tissue from injury.

Option A: The spinal cord is housed within the vertebral canal, which is formed by the stacking of vertebrae in the spine.
Option B: Viscera is a broad, non-specific term referring to the internal organs within the trunk of the body (chest and abdomen), such as the heart, liver, and intestines.
Option D: The lungs are located in the thoracic (chest) cavity and are protected by the rib cage, not the cranial bones.

Clinical Relevance

Nursing practice connection: Knowing Anatomical Body Cavities and Organ Placement helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding anatomical cavities is fundamental for nurses to accurately describe patient symptoms, locate pain, and understand the impact of trauma (e.g., a head injury affects the cranial cavity and brain).
Accurate documentation of assessment findings, such as the location of a wound or pain, requires precise anatomical terminology (e.g., 'pain in the right upper quadrant of the abdominal cavity').
What if? If a patient has a fracture of the thoracic vertebrae, the nurse's primary concern would shift from the brain (cranial cavity) to potential injury to the spinal cord (vertebral cavity) and instability of the thoracic cavity.

How to Approach the Question

First, identify the key terms in the question: 'organ', 'bony cavity', and 'cranial bones'.
The term 'cranial bones' is the most specific clue, directing your focus to the head/skull.
Systematically evaluate each option based on its known anatomical location.
Recall or deduce that the spinal cord is in the spine, the lungs are in the chest, and 'viscera' is a general term for organs in the trunk.
Conclude that the brain is the only organ listed that is housed within the cavity formed by the cranial bones.
Select the option that correctly matches the organ (brain) with its protective cavity (cranial).

Concept Tested & Keywords

QY0HS0z93WTHhVCeonmMIB

E6 Anatomy Grays 43e Vol 1 Part 3 p. 29-31

E6 Medicine Davidson Principles Practice 24e p. 1087-1089

Practise the full IGNOU PB Bsc Nsg.Entrance-2026

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