Its part of the standard definition of life: > organisms are open systems that maintain homeostasis, are composed of cells... https://en.m.wikipedia.org/wiki/

Its part of the standard definition of life: > organisms are open systems that maintain homeostasis, are composed of cells... https://en.m.wikipedia.org/wiki/Life https://en.m.wikipedia.org/wiki/Life Cell by definition have a boundary called the cell membrane. >Cells consist of cytoplasm enclosed within a membrane... https://en.m.wikipedia.org/wiki/Cell_(biology) https://en.m.wikipedia.org/wiki/Cell_(biology)