Effective in 2003, the Bureaus of Alcohol, Tobacco and Firearms (ATF), Federal Law Enforcement Training Center (FLETC), U.S. Customs, and the United States Secret Service (USSS) are no longer Bureaus of the Department of the Treasury.
The endocrine system is made up of a network of glands. These glands secrete hormones to regulate many bodily functions, including growth and metabolism. Endocrine diseases are common and usually occur when glands produce an incorrect amount of hormones.
The Endocrine System Hormones are regulating chemicals that are produced by cells at one place in the body and affect cells in other parts of the body. Chemicals produced in glands and secreted directly into the blood are referred to as endocrine hormones.