Why cry when you laugh and when chopping onions?

Why cry when you laugh and when chopping onions?

Why cry when you laugh and when chopping onions? This question needs to be answered. \

Answer:

-When you laugh:

The reason for this is that when the muscles are severely laughs era glands that store tear fluid pressure arises, it comes out of the glands and flowing.

When chopping onions:

Another case where crying is when chopping onions, the onion released a pilot

The eye tries to protect itself from rampage and raise this article to ask him the tears which wash the article the Aviator. And the same occurs with haze occurs automatically for protection and tears cleanse the eye.