A typical prokaryotic cell might contain the following parts: 1  cell wall. 2  plasma membrane. 3  cytoplasm. 4  flagella and pili.
The same is done with the jugular drain tube. A hose is attached to the drain tube, and the hose from the embalming machine is connected to the arterial tube. Drainage can also be achieved by keeping the vein open using angle forceps. Many embalmers prefer this as it allows clots and blockages to be more easily flushed from the vascular system.
For example, funeral providers may not claim that either embalming or a particular type of casket will preserve the body of the deceased for an unlimited time. In practice since ancient Egypt, embalming is most often done by using chemical substances. We use embalming today for two primary reasons--to allow adequate time between death and burial to observe social customs such as visitations and funeral services, and to prevent the spread of infection.