GCSE PE - THE PATHWAY OF AIR & GASEOUS EXCHANGE - Anatomy and Physiology (Respiratory System - 2.1)

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Lesson #7 of the Cambridge IGCSE PE syllabus.
Topic: Anatomy and Physiology
Chapter: The Respiratory System
Lesson 7: The pathway of air and gaseous exchange

Watch the next lesson (#8 - The Mechanics of Breathing):

Watch the previous lesson (#6 - Muscle fibre types):
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