What systems regulate the internal environment of the body?

Let’s consider everything on the example of a person, since each living organism has its own regulation systems. For many, they are almost the same, and some have radically different systems for regulating the internal environment of the body. In humans, almost all life processes are regulated by the hormonal system. Even the body temperature is regulated by a hormone produced by the thyroid gland. Pancreatic hormones are needed to break down organic matter. Growth requires somatropin, which is secreted by the thyroid gland. So in animals hormones regulate the internal environment of the body.