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How your esophagus works - Emma Bryce - YouTube
This is a brief clip showing how food gets from the mouth to the stomach.
แสดงข้อมูลเพิ่มเติม 1
How your stomach works-Emma Bryce
How your esophagus works - Emma Bryce
How your digestive system works - Emma Bryce
How do lungs work? - Emma Bryce
