Analysing Blood

Giving a blood sample

1. Blood is usually obtained from veins at the elbow

2. A band is placed around the upper arm

3. The band stops blood from leaving the veins making them more pronounced

4. The surface of the skin is cleaned

5. A hypodermic needle is inserted into the vein

6. A syringe (or sometimes a low pressure bottle) is attached to the needle and blood is withdrawn

7. The blood is transferred to a bottle which is then sealed

8. Pressure is applied to the puncture wound with cotton wool

9. The…