1. Unit 8: Forensic Serology
8-1 The Nature of Blood
Unit 8: Forensic Serology

2. The Nature of Blood Blood is a mixture of cells
Erythrocytes, red blood cells
White Blood cells
platelets
plasma, the fluid protein of the blood
When blood is clotted, the liquid is called serum

3. Serology
Serology involves a broad scope of laboratory tests that you specific antigen and serum anti-body reactions.
An anti-body reacts or agglutinates only with a specific antigen.

4. Detecting Abused Drugs
The concept of specific antigen – anti-body reactions has been applied to techniques for detecting abused drugs in blood in urine.

5. Blood Types Every cell blood cell contains antigens, A B or no antigen
this is called type O.

6. Antigen
The type of antigen on one’s red blood cells determines one's A-B-O blood type.

8. Blood Type
People with type A blood have A antigens in the red blood cells.
Those with type B blood have B antigens.
Type O but have no antigens on the red blood cells.