Hi (⌒∇⌒)ﾉ How many different types of blood are there? A, B, O, & AB. As you may know O negative is rare and is a universal donor, but can't receive any other blood than O negative. Why did I talk about that? Well people with blood disorders need your help c: Why should you care? If you help them you get info about yourself such as your blood type! Your blood is separated into 3parts RBC, WBC, and plasma. RBC- Red blood cells WBC-White blood cells If you donate once, you will save 3 lives! I donated 3times and I'm still young, I plan to donate much more. But I'm weak and I'm only 1 person. Together we can give more and save more lives <3 Plus you get juice and cookies afterwards lol you get double if you are O positive/negative Please stop by your local American Red Cross donation center and save 3lives Thank you <3