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.
More specifically, Human blood has about 45% blood cells and 55 percent plasma. The blood cells contain erythrocytes(red blood cells) and leukocytes(white blood cells), but it's mostly red blood cells. The plasma part has 90% water, and 10% protein, gases, waste, and enzymes.