Prove that humoral regulation is an older form of regulation of functions in the body.

First, you need to remember the definition. Humoral regulation is a way of regulating the body with the help of various fluids – hormones, enzymes, and others. Also, there is neural regulation. It is performed thanks to nerve impulses and the nervous system. But the nervous system appeared only in vertebrates. Before her, living organisms carried out only humoral regulation. In modern animal organisms, humoral regulation has remained. So in the human body, a large amount of hormones are released.