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.
(figuratively) The inhabitants of a region or district of a country. (anatomy) A place in or a part of the body in any way indicated. the abdominal regions. (obsolete) Place; rank; station; dignity. (obsolete) The space from the earth's surface out to the orbit of the moon: properly called the elemental region.