A person's blood type is based on the antigens found in the blood. These antigens, A and B are found on the surface of the blood cells and are uses as markers in the body. Type O blood does not have A or B antigens on the red blood cells, but contains both types in the plasma.
The Karst Plateau or the Karst region (Italian: Carso; Slovene: Kras), also simply known as the Karst, is a limestone plateau region extending across the border of southwestern Slovenia and northeastern Italy.he Karst Plateau or the Karst region (Italian: Carso; Slovene: Kras), also simply known as the Karst, is a limestone plateau region extending across the border of southwestern Slovenia and northeastern Italy.
Generalized map of the karst regions of Kentucky. The darker blue areas are highly karstic, and the lighter blue areas are less karstic. A more detailed, larger-scale map can be downloaded, or a paper copy is available from the Public Information Center at KGS.