what happens to blood that you get taken at a blood test?

Question: what happens to blood that you get taken at a blood test?
- Keywords:
  blood
Asked by vicmet to Hayley, Jason, Sophie on 21 Mar 2013.
- Jason King answered on 21 Mar 2013:
  
  They take the blood and send it off to a lab to do a range of tests on it. Normally they will remove all the red blood cells, and you’re left with something called serum which is a yellowy liquid. you can then do measure how much of things like iron, hormones and proteins are in it which can tell you what’s wrong with the patient.

Question: what happens to blood that you get taken at a blood test?