Endocrine organs make and release hormones into the bloodstream.  Hormones are chemicals that then control the actions of other cells or organs in the body.  Some examples are:

• Thyroid Gland – makes Thyroid Hormone that regulates metabolism
• Parathyroid Gland - makes Parathyroid Hormone that controls body’s use of calcium
• Pancreas – makes insulin and glucagon, hormones to help control the level of blood sugar
• Adrenal Gland – makes hormones to regulate blood pressure and other body functions; some examples are adrenalin (epinephrine) and steroid hormones (cortisone)
• Ovaries (in females only) - make female hormones estrogen and progesterone
• Testes, or testicles (in males only) - make male hormone testosterone