Intertwined with the world or when organisms became extinct
There are numerous discussions about why. In the end, it remains unclear how and whether the mass extinction took place at the end of the Cretaceous period 65 million years ago. But one thing is beyond question. The organism of the dinosaurs was at some point in time no longer interweaved with its environment in a form that was compatible with its survival. The inner regulatory system with which the dinosaur handled environmental stimuli was no longer able to maintain a failure-free communication.
Interaction of two organisms in their environment
So that organisms do not die or are destroyed, they constantly work on producing and maintaining their balance. If this balance were lost for S1, for example, then S1 would disintegrate and interweave with the environment. There are thus also situations of interaction that lead to the destruction/death of an organism. Examples of very varying kinds are the coming together of man with the pathogen of the pest or the extinction of the dinosaurs.
There are stimuli, disturbances/perturbations in the life of an individual that the organism handles using his own rules. We are fine, we feel well. Other impacts, however, are natured in such a way – let's think of bacteria, viruses or injuries – that the organism loses its balance... new balance develops or the balance is lost forever. The consequences are known.
They range from various illnesses to death...
Signals/stimuli flow continuously between organisms and their environment, which alter all of those concerned with time (that can be millions of years)
Biology calls this process evolution.
Eating is movement
Eating is movement, movement is behavior
My understanding of biology has been strongly shaped by Umberto Maturana. For this reason, I would like to instance a few very good examples of system and environment interactions and interrelations.
The amoeba is a highly versatile unicellular organism, is amorphous and absorbs other protozoa and eats them by moving.
What happens? If the protozoon enters its immediate environment, this environment changes.
The changed molecular concentration in the environment leads to a changing of the molecular concentration of the protozoon. Its state and shape change to be able to maintain its inner balance. The bulging out of the pseudopods makes this visible that absorbs other amoeba. The internal conditions have to be constantly kept within limits.
Thus, if the molecular concentration within the amoeba changes, then the molecular concentration of the amoeba changes. In the midst of this process is the membrane. If the internal condition of the amoeba has changed, which is shown by a change in the amoeba's shape, then the consequence is that the environment changes. And the process starts again from the beginning. A never-ending circle, which only comes to an end when the amoeba dies. In this way, every living being comprises a sensorial surface, which registers changes to its surroundings and a motor surface, which carries out the corresponding changes.
It doesn't matter how complex a living being is: this principle goes for all. In this case of human beings, it is the nervous system that is interposed between sensorial input and motor output, very complex and cannot be described in a few short words.
