________ are chemicals produced by various glands that are secreted directly into the bloodstream where they can circulate to influence cells in other locations of the body.

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Hormones are chemicals produced by glands such as the thyroid, pituitary, and adrenal glands, among others. These chemicals are secreted directly into the bloodstream, where they can circulate to influence various cells and organs throughout the body. Hormones help regulate many different bodily functions, including growth and development, metabolism, and reproduction. Examples of hormones include insulin, estrogen, testosterone, and cortisol.

________ Are Chemicals Produced by Various Glands That Are Secreted