The body makes more than 20 hormones, each with a specific function.

Describe how hormones know exactly which tissues and organs to communicate with?

Endocrine glands immediately secrete hormones into the bloodstream. In plasma, the hormones dissolve and migrate through different body tissues in the circulatory pathways. Then why do hormones in specific tissues influence only their target cells? Since there are receptors for that specific hormone only in certain target cells. On the surface of target cells, some hormones bind to receptors. In the cytoplasm or nucleus, some join the cells and bind to receptors. A series of acts that alter the cell's physiological behavior are activated by the binding. Hormones may change the functions of entire organs in this way and influence total body processes such as metabolism and development.