Where does the liquid in our tears come from?

Question

I know were like 70% water but like how do we extract it into tears?

In: Biology

Answer 1

Tear ducts, like little pouches of liquid. Same with our saliva! Squeeze around under your tongue and you’ll push out saliva, tears are kinda behind bones but your eyes will water if you push on them.

Little muscles contract and squeeze the little pouches to make our sad water come out. 🙁

To get it INTO those pouches is through diffusion. The reason tears are salty. Water is drawn to the salt that passes through the tear ducts membrane (lining.)