Circulatory System: Blood! 7SCIENCE

What is blood? Blood makes up around 8% of your body weight (5L!) Consists of: Cells and liquid Blood has many parts: Plasma Liquid part of blood, mostly water Red blood cells Has hemoglobin, important for carrying oxygen and carbon dioxide White blood cells Fight bacteria and other foreign substances Platelets Pieces of cells that help form blood clots (stop bleeding)

Why is it important to study? Has many functions: Carries oxygen from your lungs to the rest of the body Removes carbon dioxide from body cells and carries it to your lungs to be removed Carries wastes from your kidneys Transports nutrients Fights infections

Blood Types There may be times you need to receive blood Ex. surgery, accident This is called a blood transfusion Must be the right type! If it is the WRONG type, the blood cells will clump together and clog the blood vessel 4 Blood Types: A,B, AB and O Blood Transfusion Possibilities Type Can RECEIVE Can DONATE to A O, A A, AB B O, B B, AB AB O, A, B, AB O

To figure out blood types: Blood Type Calculator - if you know yours or your parents' blood types