Endoderm

In embryonic development, the endoderm is the innermost germ layer, forming the lining of the digestive tract, respiratory tract, and many internal organs including the liver, pancreas, thyroid, and bladder. These are the most ancient tissues in evolutionary terms, associated with the most fundamental survival functions: obtaining nourishment and eliminating waste.

Endodermal tissues are part of the old brain group. Their special biological programs are coordinated by the brainstem (pons), the most ancient part of the brain. The biological conflicts associated with endodermal tissues are morsel conflicts: experiences in which the psyche registers that a vital "morsel" — food, water, air, income, information, a visual morsel ("catching sight of something") — cannot be obtained, swallowed, absorbed, or eliminated.

When a morsel conflict is active, endodermal tissues respond by growing (cell proliferation), producing compact adenocarcinomas (e.g., colon cancer, lung adenocarcinoma, liver cancer) in order to enhance their absorptive or digestive function. This growth is purposeful: in a biological context of food scarcity, a larger intestinal lining is better equipped to extract nutrition. When the conflict resolves, the additional tissue is broken down by fungi and mycobacteria during the healing phase.

Endoderm conflicts are not affected by laterality in the partner/mother-child sense — this distinction did not exist at the evolutionary stage when these programs were established. Instead, the right side of the brainstem governs "incoming" morsel conflicts and the left side governs "outgoing" morsel conflicts. In paired endodermal organs (such as the lungs, tonsils, or the two lobes of the thyroid), the organ on the right will be involved in "incoming" conflicts and the organ on the left will be involved in "outgoing" conflicts.