|A substance produced in one part of the body, especially in an endocrine gland, that has an effect on another part of the body, to which it is usually carried in the bloodstream. Hormones regulate many biological processes, including growth and metabolism. On the inside, humans are bathing in a sea of hormones, chemical compounds that regulate many essential activities in the body. A lot of hormones are produced in glands known as endocrine glands, such as the thyroid gland, pancreas, and ovaries, and travel from there through the bloodstream before arriving at their target sites of action. Specialized cells of the nervous system also produce hormones. Hormones are not found only in humans, but also in all other animals and plants. The variety of different functions hormones are regulates the absorption of sugars in the body, regulates the rate of cell metabolism and affect many other processes, including reproduction and control sexual development. A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal's standards of quality, and scientific validity. Each such journal article becomes part of the permanent scientific record.