Endocrine system – these glands secrete hormones into the blood stream. The release is often associated with emotions, and the proper levels are important for a wide range of physical activity. The nervous system interfaces to the endocrine system via the hypothalamus in the Limbic brain, and the tiny pituitary gland is the master control centre for the entire endocrine system.
The position of these glands is in approximate correspondence with the chakras from Eastern teachings. It seems that the importance of the proper functioning of these glands has been understood for thousands of years.
The nervous system responds very quickly to external stimuli. The hormonal system regulates slower changes within the body – minutes, to hours, to months (pregnancy) and years (growth and replenishment).