homeostatic mechanism
Technical term in biology and physiology referring to the regulatory systems that maintain internal stability.
Thermoregulation is one example of a homeostatic mechanism.
恒常性 means 'homeostasis' itself, while 恒常性維持機構 refers specifically to the mechanism or system that maintains it.
Compound of 恒常性 (homeostasis) + 維持 (maintenance) + 機構 (mechanism). A modern scientific term.