How many tracheal cartilages are there in the human body?

Appeared in: UP NHM CHO 7 Sept 2022(shift-1st)

Explanation

The skeletal framework of the trachea is composed of 16 to 20 C-shaped rings of hyaline cartilage.
This specific number is a standard anatomical fact used to describe the structure of the lower respiratory tract.
The rings provide crucial support, preventing the airway from collapsing while allowing flexibility.
The range of 16-20 accounts for normal anatomical variation among individuals.

Option A: This range (16-19) is too restrictive and excludes individuals who may have 20 tracheal cartilages, which is within the normal anatomical range.
Option B: This range (15-18) is incorrect as it both starts too low and ends too low compared to the standard count of 16-20.
Option D: This range (15-20) is incorrect because the lower limit is 15, whereas the standard count begins at 16.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the trachea as background academic context rather than a clinical decision trigger.
Understanding the structure of the trachea is fundamental for procedures like intubation and tracheostomy, where knowledge of its anatomy prevents injury.
The C-shape of the cartilages is a critical design feature; it allows the esophagus to expand during swallowing, preventing dysphagia (difficulty swallowing).
A nurse assessing a patient with a tracheostomy must understand that the tube is placed between these cartilaginous rings to maintain an open airway.

How to Approach the Question

Identify the question type: This is a factual recall question testing specific knowledge of human anatomy.
Focus on the keywords: The key terms are "tracheal cartilages" and "how many".
Access your knowledge base: Recall the structure of the respiratory system, specifically the trachea.
Evaluate the options: Compare the numerical ranges provided in the options with the standard anatomical count you have recalled.
Select the most accurate option: Choose the range that precisely matches the accepted number of tracheal cartilages (16-20).

Concept Tested & Keywords

Q75HYUB2YPu2yCZ4G9PqR7

E6 Histology Inderbir 11e p. 11-13

E6 Anatomy Applied Ashalatha 4e p. 98-100

Practise the full UP NHM CHO 7 Sept 2022(shift-1st)

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