Human Anatomy and Physiology Study Set 1
Quiz 21: The Respiratory System
Rings of cartilage increase in number while smooth muscle presence decreases as the bronchi branch and become smaller in the conducting zone.
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The last tracheal ring of cartilage, known as the carina, has sensory receptors that can trigger a cough reflex.
Terminal bronchioles, part of the conducting zone, give rise to respiratory bronchioles, which are part of the respiratory zone.
Most inspired particles, such as dust, fail to reach the lungs because of the ciliated mucous membrane lining the upper respiratory structures.
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