Tongue Taste Map Diagram - Understanding Basic Taste Perception #283783 (License: Personal Use)

This black-and-white diagram illustrates the traditional “tongue map” model, labeling four primary taste regions: bitter at the tip, sour on the lateral edges, salty along the front-sides, and sweet at the posterior base. While historically taught, contemporary research reveals that taste receptors for all five basic tastes (including umami) are distributed across the entire tongue surface, not confined to strict zones. The image remains useful for introductory education despite its simplification.

Used in educational content about human anatomy, sensory biology, or food science; commonly appears in textbooks, science blogs, and classroom materials to introduce taste perception-though often accompanied by a disclaimer about updated scientific understanding.