Endocrine System
The endocrine system is a diffuse collection of endocrine glands. The individual endocrine glands that make up this system include the pineal gland, the hypothalamus and pituitary gland, thyroid gland, thymus, pancreas, adrenal glands, and the gonads. All of these endocrine glands produce and secrete hormones that have various effects on the body.
Figure 1: The endocrine system.