The visual system travels through time and space to understand the immensity of life.
To live together, in common happiness, you have to feel what the other is thinking and translate it into your own language to understand it.
The nervous system coordinates the human body by continuously adjusting its balance according to the external environment thanks to a triangular seat and binary signals.
The endocrine system is the art of acting at a long distance, in a targeted way using a multitude of diverse and varied molecules.
An exchange structure connects two distinct environments, which it is preferable to know and recognize in order to maintain the balance between the two.
To succeed in a long process, each step must be carried out in a specific place and order, the gastro-intestinal system has been preparing for it since embryogenesis.
An exchange structure is specific for a particular element and takes into account all the circuit traversed by this element, in the human body.
To initiate an immune response, pathogens are distinguished from normal cells, and then they are neutralized.
It is the affinity of the molecules between them which allows the cell, to react in an appropriate way to a signal, or not to react.
Beings have become multicellular thanks to the ability of cells to associate, with other cells or with the extra-cellular matrix.