CLOSE YOUR EYES IN A DAR ROOM AND DONT THINK BOUT ANYTHING WHILE BEING WARM NOT HOT AND SWEATY
I dont know but it may be urinary system as you need liquid to urinate so that propably includes kidny i am assuming and if you dont get water or get dehydratd and can cuase serous kidney issues thats why i think it is urinary system
By putting ur effort into ur work, being respectful and nice to ur class mates and teachers. u don’t have to have high marks, aslong as ur trying ur best and making it work, asking for help when u need it, then ur a good student
