Simplify the following text for a Grade 8 native English-speaking person.
Original: Saliva ( sÉ Ë laÉ vÉ , referred to in various contexts as spit , spittle , drivel , drool , or slobber ) is the watery and usually frothy substance produced in the mouths of humans and most other animals . Saliva is a component of oral fluid .
Simplified: Saliva is the watery substance made in the mouths of humans and some animals .