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.
You know what blood is â it's that red stuff that oozes out if you get a paper cut. The average person has about 1 to 1Â½ gallons (4-6 liters) of it. But what is blood, really, and where does it come from? How Does the Body Make Blood? It's not made in a kitchen, but blood has ingredients, just like a recipe. To make blood, your body needs to mix: 1  red blood cells, which carry oxygen throughout the body. 2  white blood cells, which fight infections. 3  platelets, which are cells that help you stop bleeding if you get a cut. 4  plasma, a yellowish liquid that carries nutrients, hormones, and proteins throughout the body.