Can someone please help me. The subject is health

I can tell you the ones I know

Explanation:

4 is immune system

8 is mucus

and I pretty sure 9 is virus if I get u wrong I'm  so sorry  

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.

answer; 100 languages;