VIDEO: Every day arm day.ㅣ The tree was there first ㅣ Preventing food and drink from going to lungs

Every day arm day.

Awesome 9gag.com

The tree was there first

Awesome 9gag.com

How the epiglottis works while swallowing, preventing food and drink from going to lungs

GIF

설명

1. 달인

2. 나무가 우선

3, 음식물과 음료수가 폐로 가는 것을 방지하는 메커니즘

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