Why are hormones called chemical messenger?

Hormones are often referred to as "chemical messengers" because they play a crucial role in transmitting signals and coordinating communication between different cells and organs in the body. These molecules are produced by endocrine glands and are released into the bloodstream, where they travel to target cells and elicit specific responses.

The term "chemical messenger" reflects the function of hormones in transmitting information and regulating various physiological processes. Like messengers delivering important instructions, hormones bind to specific receptors on target cells, triggering a cascade of events that ultimately influence the cell's activity. This communication system helps to coordinate and integrate the activities of different tissues and organs, allowing the body to maintain balance and respond to changes in its internal and external environment.

In summary, hormones act as chemical messengers because they carry signals from one part of the body to another, facilitating communication and coordination among different cells and organs.