chemical signals

Chemical signals are molecules used by organisms to communicate and coordinate actions within their bodies or with others. They travel through fluids like blood or across space to deliver messages that regulate biological processes, such as growth, immune responses, or behavior. Hormones are a common example—they act as chemical messengers that influence organ function. These signals can be very specific, targeting particular cells or tissues, and are essential for maintaining normal function and responding to environmental changes. In essence, chemical signaling allows complex communication networks vital for life.