A bun is a (bun) small, sometimes sweet, bread, or bread roll. Though they come in many shapes and sizes, they are most commonly hand-sized or smaller, with a round top and flat bottom.

The liver produces urea in the urea cycle as a waste product of the digestion of protein. Normal human adult blood should contain between 6 to 20 mg of urea nitrogen per 100 ml (6–20 mg/dL) of blood. Individual laboratories will have different reference ranges as the assay used will vary between laboratories.

Rice vermicelli are a thin form of rice noodles. They are sometimes referred to as rice noodles, rice sticks, or bee hoon, but they should not be confused with cellophane noodles, which is an Asian type of vermicelli made from mung bean starch rather than rice.