Why do we breathe? The human metabolism
At school, you learn the basics of human physiology. For example, you learn that there are organs that perform various vital tasks - the heart pumps blood through the body, the lungs breathe in air and the brain controls everything. As nice as it is to learn this at school, it is unsatisfactory in that the lessons only scratch the surface and leave important questions about the "why" unanswered. In the following article, I would like to go into a little more depth. Why do we drink? Humans are multicellular organisms, consisting of numerous cells, i.e. spaces enclosed by a membrane, which in turn contain a nucleus and numerous organelles. In the course of evolution, these multicellular organisms have developed from single-celled organisms that originally lived in water. They are therefore accustomed to an aqueous environment, indeed they need it to live. This is the reason why humans also need fluids. It is not for nothing that humans consist of about 60% water. The fluid bala