Respiratory Anatomy / The Anatomy of Breathing Part 2: Accessory Muscles & More

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Lesson Overview

In this lesson, we go deeper into respiratory anatomy including how different muscles serve different purposes.


Become familiar with the nasal cycle and lungs, plus the differentiation between primary and accessory respiratory muscles and the muscles used for inspiration and for expiration.


Understand the function of the nose in breathing and explain the nasal cycle. Describe the connections for each nostril. Differentiate primary respiratory muscles from accessory ones and explain the purpose of the latter. Name six muscles involved in exhalation and explain why the fill capacity of the upper lungs is less than the lower. Understand the role of the intercostals in breathing.

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