Section 2-4. Life begins with eating. Eating is a center for living bodies

This can also be compared to the evolution from unicellular animals to humans. Starting from protozoa including amoeba in which predatory activities played a central role, the evolution occurred to protochordate, cartilaginous fish, and finally mammals. Expansion of new functions during the course of evolution did not occur only by sudden addition of new functions independent from the existing organs but by upgrading of the whole systems in the forms of expansion and differentiation of functions. Accordingly, the primordal system in which the predatory organs play a central role in the life activities would not be changed even if this system becomes complicated or any new organs and new functions are added. Prandial activities are the central one for any lives.
In the process of actual evolution, cephalic and visceral skeletons and muscles are called as “gill arch organs” and it was known that they derived from gills. When it comes to gills, gills in animals just before evolution to vertebrates or the initial verbrates did not contribute to only respiration but worked as predatory organs or digestive organs to get nutrition through filtering planktons from water. Respiration was mainly performed via mucoid membranes on the body surface. Vestigial evidence is now observed in a fish which resembles lancelet belonging to protochordates. Although brain is recognized as the center of the body, the brain in the initial stages of evolution of vertebras was only a lump comprising nervous cells. In the course of evolution, this lump evolved into much more complicated structure consisting of cerebrum, interbrain, mid brain, cerebellum and medulla.
However, instead of pursuing the center of human lives, questions were centered on where mental activities such as thinking, worrying, pleased or agony are produced for a long time among the well-educated persons. As the natural consequence, no discussion on the center of our lives or the basis of our bodies was conducted whereby we misunderstood that the point where our heart exists was regarded as the center of our bodies. Hippocrates (427 B.C.～347 B.C.) and Plato (427 B.C.～347 B.C.) stated “Our soul exists in the brain”. This concept was adopted to the religious principle of Christianity and then, “Brain center theory” was propagated. Subsequently, in parallel with advance of the cephalic physiology, the central functions of the brain were gradually clarified, and furthermore, the center of the living body was considered to be localized in the brain. Taking into account the progress of evolution, it could be explained by the Brain center theory; however, it would be more rational to attribute the center of the living body to the brain, special sensory organs like eyes, and the whole head containing the predacious organs including teeth and tongue. Chewing organs structurally comprise a part of the cranial bone as the jaw joint while chewing muscles are adhered to the cranial bone. Given the evolution process of the “gill arch organs”, it seems appropriate to consider that the total tissues including cranial bone, submaxillary bone, 32 teeth and the corresponding muscles and sensory organs should be recognized as “Hazo (Teeth-organ)”. Sometimes people say that heart, liver and kidney are indispensable organs for our lives but teeth are not; as the results, teeth can be disregarded in their nature. However, once teeth are evaluated from the entire “Hazo (Teeth-organ)” theory, absence of teeth indicates our deaths. Each tooth plays a role as one sensory organ which acts as the information emitting center. Eyes and ears work as a pair, respectively but teeth amount to 16 pairs. Complete sets of them exert significant contribution to the whole body functions.