First slide

Human Respiratory System

Question

Which of the following part of the respiratory tract does not have cartilaginous rings in its wall ?

Easy

A

Trachea
B

Primary bronchi
C

Secondary bronchi
D

Respiratory bronchioles

Solution

Trachea, primary bronchi, secondary bronchi, tertiary bronchi and initial bronchioles are supported by incomplete cartilaginous rings. Respiratory bronchioles do not have these rings.

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