Answer: Hormones.
Explanation: Hormones are chemicals secreted from the endocrine gland. Hormones are secreted from the glands and circulated to various parts of the body according to its function.
A wide variety of chemical messengers are secreted by the endocrine cells that help in various processes of the body such as metabolism, growth and development, reproduction et cetera.
The hormone secreted from the endocrine gland enters into the blood stream and reaches the target cell for its function or effect.
