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.
Your blood is made of white blood cells, red blood cells,  platelets, and plasma.   The white blood cells fight infections and are part of the body's  immune system.aguely speaking, human blood is composed of blood cells, plasma, and platelets More specifically, Human blood has about 45% blood cells and 55 percent plasma. The blood cel â¦ ls contain erythrocytes(red blood cells) and leukocytes(white blood cells), but it's mostly red blood cells.