Each chakra corresponds to certain physical systems and their related organs. There is a direct relationship between the condition of the chakra and the corresponding physical organs, because a chakra can be over-vitalised, under-vitalised, in a state of balance, open or blocked. Dysfunction of the reproductive system, for example, will usually manifest itself with obvious physical systems, such as disrupted menstruation. The physical systems will be mirrored by dysfunction of the related energy network and the chakra itself. Therefore, creating change to restore the related energy system to a state of balance will create change at the physical level.
The chakras function as transmitters of energy from one level to another, distributing pranic energy to the physical body. This is done, in part, through the glands, which regulate different systems within the body. Each of the chakras is also related to a major gland.
Muladhara Chakra is related to the adrenal glands, the kidneys, and the spinal column.
Svadhisthana Chakra is related to the female ovaries and male testes. It looks after our liver, kidneys, and the lower abdomen.
Manipura Chakra is apparently related to the digestive system, the spleen, the liver, the pancreas, and the gall bladder, which produces and secretes enzymes, acids, and juices necessary for the digestion and absorption of nutrients.
Anahata chakra is related to the heart, blood, lungs, and the circulatory system in general – along with the immune and endocrine systems.
Vishuddhi chakra is apparently related to the thyroids, the rate of metabolism, and the lungs in the physical body.
Ajna chakra is apparently related to the pituitary gland and the small brain.
Sahasrara chakra is related to the pineal gland, a light sensitive gland that produces the hormone, melatonin – which regulates sleep and awakening.
The number of chakras varies between yogic traditions. Most traditions give a number between six and nine, but the number most frequently given is seven. These include the six chakras of awakening, and the crown chakra at the top of the head.