GENERAL HISTOLOGY

Detailed explanation-1: -Hormones can be thought of as chemical messages. From the blood stream, the hormones communicate with the body by heading towards their target cell to bring about a particular change or effect to that cell. The hormone can also create changes in the cells of surrounding tissues (paracrine effect).

Detailed explanation-2: -Hormones are called chemical substances which are used for transmitting messages from one part of the body to the other. These chemicals regulate the body metabolism and act as messengers. So they are referred to as chemical messengers.

Detailed explanation-3: -Endocrine glands release hormones (chemical messengers) into the bloodstream to be transported to various organs and tissues throughout the body. For instance, the pancreas secretes insulin, which allows the body to regulate levels of sugar in the blood.

Detailed explanation-4: -Like the nervous system, the endocrine system is a regulatory system. However, instead of using electrical impulses for signaling, it produces and uses chemical signals called hormones, which travel through the bloodstream and control the actions of cells and organs.