Human Blood Types Exist because there are three proteins that can be found on human red blood cells: A protein B protein Rh Factor [if it’s present, the blood is called +] [if it’s not present, the blood is called – ]

8 Blood Types A - A + B - B + AB - AB + O - O + “A – ” Blood “A +” Blood Rh A Rh A A A A A A Rh A Rh 8 Blood Types “B – ” Blood “B +” Blood A - B Rh B Rh B Rh B B B B B Rh A + B - “AB – ” Blood “AB +” Blood B + Rh A B A B Rh A Rh A AB - A B B B A Rh AB + “O – ” Blood O - “O +” Blood Rh Rh O + Rh Rh Rh

FREQUENCIES OF THE HUMAN BLOOD TYPES FREQUENCY IN THE POPULATION White African American Hispanic Asian O + 37% 47% 53% 39% O - 8% 4% 1% A + 33% 24% 29% 27% A - 7% 2% 0.5% B + 9% 18% 25% B - 0.4% AB + 3% AB - 0.3% 0.2% 0.1%

When blood from a donor is given to someone who needs it Transfusion When blood from a donor is given to someone who needs it TRANSFUSION RULE You must NEVER give the patient (the recipient) a blood protein that is foreign to his/her body!

LESSON on BLOOD TRANSFUSIONS Exist because there are three proteins that can be found on human red blood cells:

Transfusion TRANSFUSION RULE

8 Blood Types “A – ” Blood “A +” Blood “B – ” Blood “B +” Blood “AB – ” Blood “AB +” Blood “O – ” Blood “O +” Blood

FREQUENCY IN THE POPULATION FREQUENCIES OF THE HUMAN BLOOD TYPES FREQUENCY IN THE POPULATION BLOOD TYPE White African American Hispanic Asian 37% 47% 53% 39% 8% 4% 1% 33% 24% 29% 27% 7% 2% 0.5% 9% 18% 25% 0.4% 3% 0.3% 0.2% 0.1%