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.
In an adult human, blood forms 7% to 8% of the whole body weight and contains around 5 liters. However, this total volume varies considerably with an individualâs size, composition of body, and state of training. Red blood cells, white blood cells, and platelets are collectively called formed elements.The formed elements constitute 40% to 50% of total blood volume.ed blood cells, also known as erythrocytes, are the main formed component of blood, and they constitute 45% of the blood volume in an adult human. Unlike the other formed-elements, the red blood cells contain hemoglobin, a pigment that binds and transport oxygen.