What collection of multiple complex systems to form a complete self-regulating entity capable of reproducing is called?

A collection of multiple complex systems that forms a complete self-regulating entity capable of reproducing is called a "living organism." These organisms are characterized by their ability to maintain homeostasis, grow, and reproduce, often through intricate interactions among various biological systems such as cells, tissues, and organs. This integrated functionality allows them to adapt to their environments and sustain life.