1. Parts of the blood Blood is the fluid circulating in the body that carries nutrients and oxygen, removes waste products and fights infection. Red Blood Cells Plasma White Cells Platelets

2. Red blood cells Red blood cells carry oxygen to the body’s organs and tissues. The inside of the red blood cell is filled with the protein haemoglobin.

3. Plasma Blood cells float in a straw- coloured liquid called plasma Plasma consist of water, waste, and hormones.

4. White blood cells White blood cells attack invading microbes that cause disease They do this in two ways: 1. One type of white blood cell produces chemicals called antibodies. These antibodies lock on to proteins called antigens on the surface of the microbes. 2. Another type of white blood cell digests any microbes the antibodies lock on to.

5. Platelets Platelets are bits of cell broken off large cells They help blood to clot and stop bleeding at cuts.

6. If wound is too large, your blood doesn’t clot. You need a blood transfusion Blood transfusion-transfer of blood from one person to next Replaces lost blood Regularly treat serious blood diseases.

7. Blood groups There are four blood groups – A, B, AB and O Your parents’ blood groups affect what group you belong to. One gene from mother one gene from father Your genes cause proteins to exist on surface of all red blood cells

8. Clumping Proteins These proteins recognize foreign blood and then clump –Ex: if you have blood type A, your blood will clump when mixed with B Clumping= failed transfusion. Clogs capillaries and leads to death

9. Clumping

10. % of Population of Blood Type Universal Donor Universal Receiver