What is the Meaning & Definition of organisms

We understand by agencies all living things that make up the different spaces of the Earth and that can vary greatly in form, characteristics and fundamental elements, from micro-organisms to gigantic animals of more than a hundred meters long. All organisms are the presence of matter as well as a permanent interaction between inside and outside environment through different kinds of biological relationships.
Organisms are characterized by unicellular or multicellular, being the first compounds only a cell and the second of several million of them. In this regard, we can mention various types of organisms according to their complexity: Archaea (which they do not have cell membrane and are therefore more simple), bacteria, (usually unicellular) protozoa, fungi, plants, and, finally, animals (the most advanced of all living organisms).
Some of the most important in any type of organism abilities is firstly the Organization (that which makes that they are composed of one or more cells), irritability (or immediate response to stimuli from the outside), homeostasis (or maintenance of a more or less permanent internal order), development (or generated transformations from the evolution), metabolism (which is the ability to eat and consume energy to be developed) , playback (basically for survival), and finally the adaptation (which allows you to sort different situations).
Organisms that take place on our planet Earth are that give it its characteristic of only known space where life can develop. These organisms require a permanent contact with the environment that surrounds them and develop with and through the same ways, phenomena and changes that lead them to their evolution or eventual disappearance (if fail to adapt).