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.
View full size image. Enough to fill one or two one-gallon milk jugs. Blood accounts for about seven percent of human body weight, and its density is only slightly more than that of pure water. Blood is made up of plasma (which accounts for about 3 liters), red blood cells, white bloods cells, and platelets. Vitamins, electrolytes and other nutrients are dissolved in the blood and carried to the body's cells and organs. Follow Life's Little Mysteries on Twitter @llmysteries.