why are tears salty?



why are tears salty?

In: Biology

Your tears are salty because they contain natural salts called electrolytes. Fun fact: electrolytes are salt solved water!

Basically because people are salty. Water makes up most of your body, but it isn’t pure fresh water. It has tones of ions dissolved in it, the salinity of our blood for example is around 9g/L (compared to about 35g/L for most seawater). To excrete fresh water would require energy to actively transport these ions out of it for no benefit.