| A | B |
|---|
| ABO typing | Blood typing is a test to classify blood by determining the absence or presence of antigens on the red blood cells. |
| agglutination | clotting of the blood ; An allergic reaction where red blood cells clump together usually in response to a particular antibody. |
| antibody | A substance that reacts with an antigen; proteins in the blood or secreted fluids that tag, destroy, or neutralize bacteria, viruses or other harmful toxins thereby producing an immune response. |
| antigen | the presence of these triggers an immune response, usually the production of antibodies; A substance that can stimulate the body to make antibodies |
| antiserum | Human or animal serum containing antibodies that are specific for one or more antigens |
| blood factor | A specific combination of antigens, enzymes, and proteins in the blood. |
| blood spatter | Patterns produced under different conditions as a result of various forces applied to the source of blood. |
| Erythrocyte | Red blood cell responsible for oxygen distribution |
| Hemoglobin | The oxygen carrier in the blood. It gives red blood cells their color |
| High velocity impact spatter | Produced by a gunshot or high speed machinery |
| Leukocyte | White blood cells responsible for fighting infection. |
| Plasma | one of the 4 parts of blood; the fluid portion of the blood |
| Precipitin test | Test that distinguishes between human and animal blood |
| Presumptive tests | Screening tests that presume the presence of the questioned substance |
| Secretor | A person whose blood type antigens are also found in other body fluids, like mucus; 80% of people are secretors |
| Serology- | the laboratory study of body fluids using specific antigen and serum antibody reactions |
| Serum | A liquid that separates from clotted blood. |
| Wipe pattern | A non-blood bearing object (like a hand or scarf) moves through a wet bloodstain altering the appearance of the original stain |
