Chakras are the energy centers of the body. There is a strong physical component in the relationship between the chakras and the endocrine system. Each Chakra relates to a system of the body. As human beings we are very hormonal in regards to our actions, and our emotions. Police and emergency workers have long held a statistic that there are more accidents, erratic behavior during a full moon. Why? the moon as it gets close to the earth uses its gravitational forces to affect not only the tides but because we are 80% water it also affects the hormones and how they travel within our body. Werewolf lore is strongly based on this. The chakras closely follow the endocrine system and its behaviors, having been called the " wheels of light", they have a strong tie to various emotional charachteristics as well as physical, mental and spirtual facets.