The cremation process takes place inside a cremation chamber constructed to withstand intense heat and flame, reaching temperatures as high as 1800°F (1000°C). The structure that houses the cremation chamber is called the crematory or crematorium. Pacemakers and other implanted mechanical or prosthetic devices can explode during cremation, and must be removed. The cremation process begins with the placement of the casket or container in the cremation chamber where it is subjected to intense heat and flames reducing the human remains to bone fragments, referred to as ‘cremated remains’. Once separated from any non-combustible materials, the bone fragments may be further reduced by mechanical means to uniform particles for placement in an urn or sturdy container. Depending on the size of the deceased, the cremated remains for an adult will weigh between 4-8 lbs. Very little, if any remains follow the cremation of a fetus or very young child. The cremated remains are usually white in color, but can be other colors due to temperature variations and other factors.