The progress of draing the blood out body to help preserver it is called?

The progress of draining the blood out of a body to help preserve it is called exsanguination. This process is typically performed by cutting a major artery, such as the carotid or femoral artery, and allowing the blood to drain out of the body. Exsanguination has been used for centuries as a method of preserving bodies, as it helps to prevent the growth of bacteria and the decomposition of the body. In some cultures, exsanguination is also considered to be a religious ritual, and it is often performed before a body is buried or cremated.