What does the term 'drainage' refer to in the context of embalming?

In the context of embalming, the term 'drainage' specifically refers to the removal of blood from the body. This is a critical step in the embalming process as it helps to prepare the body for the injection of embalming fluid. By draining the blood, embalmers can minimize the risk of tissue discoloration and the growth of bacteria, which can otherwise lead to decomposition. The act of drainage facilitates optimal preservation and disinfection of the body during the embalming procedure. This process helps to ensure that the embalming fluid can adequately fill the vascular system, replacing the blood and aiding in the preservation of the body for viewing and final disposition.