Microbiome

Placeholder root. This file is an overview only; detailed nested scaffolding will be built later.

The human body is also an ecosystem. Trillions of bacteria, viruses, fungi, and other microbes live on and inside it — most of them in the gut. Collectively they are the microbiome.

What this root will cover

• Where microbes live — the gut, skin, mouth, and other distinct communities.
• What they do — aiding digestion, producing vitamins, training the immune system, crowding out invaders.
• The gut–body connection — links between gut microbes and metabolism, immunity, and even mood.
• How it forms and changes — colonization from birth onward, and the effects of diet and antibiotics.
• When it goes wrong — imbalances associated with disease.

Why it belongs at the root

The microbiome is not human tissue at all, yet it is genuinely part of how a human functions — arguably an extra “organ” we acquire rather than grow. Because it sits outside classical anatomy, it earns its own top-level entry point.