Examlex
Which are characteristics of type O blood?
A: Has anti-A antibodies
B: Has anti-B antibodies
C: Has surface antigen O on its erythrocytes
D: Has surface antigen A on its erythrocytes
E: Has neither surface antigen A nor B on its erythrocytes
Thrombin
An enzyme in blood plasma that causes the clotting of blood by converting fibrinogen to fibrin.
Phagocytotic Cells
Cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.
Monocytes
A form of leukocyte crucial to the immune system, as it evolves into macrophages and dendritic cells.
Neutrophils
A type of white blood cell that helps the body fight infections by engulfing and destroying bacteria and fungi.
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