CNA's - Feeding, changing, cleaning, bathing, turning, ADL charts, empty caths/colostomy bags. You have to do a round every 2hrs.
Nurse's (LPN) - Pass meds, feeding tubes, charting, check sugar, insert caths, etc
Nurse's (RN) - Same as LPN except they can start IV's and admin meds thru. RN's are usually the supervisor's on the floor. When emergency's happen they are the one who make the decision and calls and so forth. They are also the only one's who can pronouce someone whose passed away (unless its the funeral director, which seldomly happens)