The Tzotzil believe that each human being has two souls, a "ch'ulel" and a "wayhel". The "ch'ulel" is an inner, personal soul, located in the heart and blood, placed in the unborn embryo by the ancestral gods. It is composed of thirteen parts, and a person who loses one or more of these parts must have a curing ceremony performed by a shaman to recover them. "Soul loss" may be caused by fright of falling down or seeing a demon on a dark night; as a punishment by the ancestral gods for misbehavior; or by being sold into slavery to the Earth Lord, through evil witchcraft. At death, the inner soul leaves the body and goes to the "Katibak", the world of the dead in the center of the earth. There it will remain for the same length of time it had been in the human world, reliving his life in reverse, younger and younger, until it is assigned by the ancestral gods to another newborn of the opposite sex. Baptized infants and women who die in childbirth go directly to Winajel, located in the Sun. People who have drowned, have been murdered, or were struck by lightning do not go to Katibak. Animals and trees too have "ch'ulel" soul, which goes through the same cycle.