Pelvic cavity consists of one of the following structures:

Appeared in: IGNOU PB Bsc Entrance-2022

Explanation

The pelvic cavity is the most inferior body cavity, located within the pelvis.
It primarily houses the terminal end of the gastrointestinal tract, urinary bladder, and internal reproductive organs.
The sigmoid colon is the S-shaped final part of the large intestine and is located within the pelvic cavity before terminating at the rectum.

Option A: The stomach is a key digestive organ located in the upper part of the abdominal cavity, specifically in the epigastric, umbilical, and left hypochondriac regions.
Option B: The diaphragm is a large muscle that forms the boundary between the thoracic cavity (above) and the abdominal cavity (below). It is not an organ contained within the pelvic cavity.
Option D: Alveoli are microscopic air sacs that are the functional units of the lungs. The lungs are located within the thoracic (chest) cavity.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of Body Cavities as background academic context rather than a clinical decision trigger.
A nurse's knowledge of organ location is crucial for performing accurate physical assessments, including palpation, percussion, and auscultation of the abdomen and pelvis.
Pain in the left lower quadrant, where the sigmoid colon is located, can indicate serious conditions like diverticulitis or sigmoid volvulus, guiding the nurse's focused assessment and reporting.
What if? If a patient presents with suprapubic pain and difficulty urinating, the nurse would focus assessment on the pelvic cavity, as this is the location of the urinary bladder.

How to Approach the Question

First, identify the key anatomical region in the question stem: 'Pelvic cavity'.
Second, mentally recall the major organs and structures located within this specific body cavity. The pelvic cavity contains the bladder, rectum, reproductive organs, and the sigmoid colon.
Third, evaluate each option to determine if it is located within the pelvic cavity.
Fourth, systematically eliminate the incorrect options by identifying their correct anatomical locations: Stomach (abdominal cavity), Diaphragm (boundary between thoracic and abdominal cavities), Alveoli (thoracic cavity).
This process of elimination, based on foundational anatomical knowledge, confirms that the sigmoid colon is the only listed structure within the pelvic cavity.

Concept Tested & Keywords

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E6 Anatomy MindMaps BDChaurasia V2 10e p. 9-11

E6 Anatomy BDChaurasia V2 10e Part 2 p. 117-119

E6 Anatomy Applied Ashalatha 4e p. 122-124

Practise the full IGNOU PB Bsc Entrance-2022

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