what is meant by chemical messages
Chemical messages usually refer to hormonal messages. In addition, it refers to messages transmitted by other chemical messengers (any compound that serves to transmit a message) like neurotransmitters, neuropeptides or pheromones.
Hormones are chemicals secreted by glands in the body. Different hormones affect different target organs or target cells. The bloodstream transports hormones from the glands to the target organs. Hormones regulate the functions of many cells and organs.