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.
Blood is made up of three parts: red cells, white cells and platelets. Red blood cells are responsible for the oxygen delivery from the lungs to the tissue in the body. White blood cells are a part of the immune system. These components circulate in the fluids in the blood vessels, which is pumped by the heart.