How do you call from another script?

I have two extremely basic scripts. One for hunger and one for health in my game. I am having trouble calling functions from the hunger script into the health script. I am pretty new to coding but i can usually understand code just fine. (see scripts below)

Line 35 is where i think i need to call to the hunger script

 #pragma strict
 
 var MaxHealth = 100;
 var Health : int;
 var timer : float;
 
 function Sart ()
 {
     Health = MaxHealth;
 }
 
 function ApplyDammage (TheDammage : int)
 {
     Health -= TheDammage;
     
     if(Health <= 0)
     {
         Dead();
     }
 }
 
 function Dead()
 {
     RespawnMenuV2.playerIsDead = true;
     Debug.Log("Player Died");
 }
 
 function RespawnStats  ()
 {
     Health = MaxHealth;
 }
 
 function Hungery()
 {
 //place where i think i need to call from the Hunger Script
 timer+=Time.deltaTime;
     if(timer>20)
     {
     Health-=1;
     healthreset();
     }
 }
 
 function healthreset()
 {
 timer=0;
 }

Line 22 is where the hunger(); is called (im sorry i couldnt separate the two scripts)

 #pragma strict
 
 var Hunger:int;
 var MaxHunger:float=2000;
 var timer:float;
 
 function Start () 
 {
     Hunger=MaxHunger;
 }
 
 function Update ()
 {
     timer+=Time.deltaTime;
     if(timer>20)
     {
     Hunger-=1;
     hungerreset();
     }
     if (Hunger<0)
     {
     Hungery(); //i have placed this function in the health script
     }    
 }
 
 function hungerreset()
 {
 timer=0;
 }
 
 function OnGUI ()
 {
     GUI.Box(Rect(900,550,85,55),"Hunger"+Hunger);
 }