In the simplest meaning, chakras are the subtle but powerful energy centers inside the human body.

The word "Chakra" is actually derived from an Indian word which means wheel or circle. In Reiki, we focus on the seven major chakras or energy centers seated inside a person. These chakras are situated in different points of the body. Each chakra works with a group of vital organs.

Root Chakra
This chakra is positioned at the bottom of the pelvis. The organs that are under it are the kidneys, adrenal glands, leg bones, large intestines, rectum, and spinal column. It is the chakra that keeps a person grounded to his physical existence.

Sacral Chakra
The Chakra is positioned below the navel. The whole reproductive system belongs to it, including the bladder and spleen. This chakra can fuel one's creativity, emotions, and sexuality.

Solar Plexus Chakra
This chakra which is situated below the ribs above the navel, directly affects the liver, stomach, gall bladder, small intestines, and pancreas. It is associated with a person's intellectual processes. The Solar Plexus Chakra is also the seat of power. Once open and balanced, it can transform all of your aspirations and hopes into reality.

Heart Chakra
This chakra which in the centre of the chest controls many of the functions associated with the heart, including the arms, lower lungs, skin, and the thymus gland. This chakra takes care of the entire circulatory system. The Heart Chakra is the one that creates the link from the physical world towards spiritual existence. It is also the center of one's emotions, especially the emotion of love.

Throat Chakra
This chakra which is in the throat controls the thyroid gland, throat, jaw, upper lungs, and vocal chords. It may also affect the digestive system. This chakra governs a person's ability to communicate. It also inspires mental creativity.

Third-eye Chakra
This chakra which is in the centre of the forehead corresponds to the brain, nose, face, eyes, and almost all of the organs situated in the head. It also has power over the lower brain, pituitary gland, and the central nervous system. This chakra opens one's intuition. It allows a person to visualize, manifest, and even create visions beyond ordinary sight.

Crown Chakra
This chakra which is at the top of the head corresponds to the person's whole being. It is one's direct connection to the spirit.

A deficiency in any of these chakras would correspond with an illness. Reiki aims to clear, open, and balance these energy points to achieve health, overall wellness, and peace.