Medical Definition of sphincter of Oddi. : a complex sphincter closing the duodenal orifice of the common bile duct.
Human blood is made of plasma (makes up 54.3% of the blood volume) and several kinds of cells (corpuscles); these are 1  â. erythrocytes (RBC) â 45% of blood by volume. 2  leukocytes (WBC) â 0.7% of blood by volume. 3  thrombocytes (platelets) â minute amounts.
The common precursor is blood, and the level of purification of the blood is the determinant of plasma and serum. When we consider blood, it is made up of red blood cells, white blood cells, platelets, proteins, and a watery substance.