ENDODERM (Inner Germ Layer) developed during the earliest evolutionary period at a time when the creature was still living in the water environment. Naturally, the endoderm is also the first germ layer of the embryonic stage. Being the first layer, the endoderm forms the oldest organs. It develops the sub mucosa of the entire alimentary canal from the mouth to the rectum, the inner coating of the prostate, the uterus (without the cervix) and the fallopian tubes. The nuclei of the acoustic nerves, the thyroid gland, the kidney collecting tubules, the lung alveoli and the liver also derive from the endoderm.

The oldest organs that originate from the oldest germ layer are controlled from the oldest part of the brain, the brain stem (diagram), and consequently respond to the oldest conflicts. In the brain stem laterality is insignificant. 

Biological conflicts of the brain stem are concerned with basic survival issues such as breathing, reproduction and food. The alimentary canal corresponds to so-called ”morsel“-conflicts, alluding to the real food morsel or food chunk. The ”inability of getting a hold of a morsel“ is linked to the mouth and pharynx (including the palate, tonsils, salivary glands, and the naso-pharynx), the " conflict of not being able to swallow a morsel“ relates to the esophagus (lower part), the ”inability to digest a morsel“ corresponds to the organs of the digestive system such as the stomach (except the small curvature), the small intestines, the large intestines, the sigmoid colon and rectum, as well as the liver and the pancreas. Animals experience such ”morsel“-conflicts in real terms, e.g. when a piece of food is stuck in the intestine. Since human beings are able to interact with the world in a more abstract fashion through language and symbols, we humans often experience these ”morsel“-conflicts in a figurative manner. Such a figurative morsel can translate into a contract we could not ”catch“, an offending remark we could not ”digest“, ”morsels“ we want to possess, ”morsels“ we hold on to, ”morsels“ that were taken away from us, or ”morsels“ we can not get rid of.

The middle ear is linked to hearing conflicts. The conflict of ”not being able to catch a piece of information“, e.g. missing an important message, affects the right ear, whereas the conflict of ”not being able to get rid of a piece of information“, e.g. an unpleasant message, affects the left ear.     

The lungs and the kidneys hold the oldest survivial programs. While the kidney collecting tubules relate to an "existence conflict" and a ”profound abandonment conflict“ (feeling isolated, excluded, being suddenly away from our ”group“, e.g. being hospitalized or put into a nursing home), the lung alveoli instantly respond to a ”death fright conflict“, often triggered through a unexpected cancer diagnosis. The liver responds to a "starvation conflict", e.g. triggered by vomiting during chemo therapy. The uterus and prostate are linked to a half-genital-conflict relating to an ugly conflict with the opposite gender.

Histological formations: all organs and tissues that derive from the endoderm and are directed by the brain stem show in the conflict active phase cell increase in form of an adeno-carcinoma. Thus, cancer of the colon, the liver, the lungs, the kidneys, the uterus, or the prostate all originate in the brain stem and are caused by their corresponding conflict shocks. With the resolution of the conflict the tumor immediately stops growing. During the healing phase the extra cells that are no longer needed are decomposed with the help of specialized microbes (diagram, fungi and myco-bacteria).
While there is cell increase (tumor growth) during the conflict active phase, there is cell decrease (tumor destruction) during the healing phase. If the microbes are not available, perhaps due to vaccination, the tumor stays in place without further cell proliferation. As long as the tumor does not cause any mechanical obstruction and no hormone producing tissue is involved, the tumor is considered as completely harmless.