Homeostasis is the existence and maintenance of a relatively constant environment within the body. To achieve homeostasis, the body must actively regulate conditions that are constantly changing. As our bodies undergo their everyday processes, we are continuously exposed to new conditions. We call these conditions variables. One variable familiar to all of us is body temperature. Body temperature is a variable that can increase in a hot environment or decrease in a cold one. The organ systems help keep the body’s internal environment relatively constant. Most systems of the body are regulated by negative feedback mechanisms, which maintain homeostasis. Negative means that any deviation from the set point is made smaller or is resisted; therefore,
