Preserving a dead body is a process known as embalming. Embalming is the process of treating a corpse with chemicals and other materials to delay decomposition and preserve the body for viewing or burial. It is most commonly used in funeral homes and mortuaries, and is an important part of many cultures' death rituals. Embalming is done by injecting preservatives and disinfectants into the body, and then draining out the blood and replacing it with a formaldehyde-based solution. This process helps to slow down the decomposition process and allows the body to be viewed for a longer period of time.