Digestive / VISUAL EXPLAINER
Are Bile Ducts Just Passive Pipes?
Bile begins in hepatocyte canaliculi and is modified as it passes through the duct system. Cholangiocytes lining bile ducts contribute bicarbonate and water, helping adjust bile volume and composition rather than serving as a passive pipe.

READ THE IMAGE
What the illustration shows
Cream-and-gold poster asking Are bile ducts just passive pipes? A liver locator leads to a magnified cutaway tube with pink epithelial cells around a green-gold bile lumen and outer supporting tissue. Labels identify bile duct, cholangiocyte, lumen and supporting tissue. Cyan water and gold bicarbonate arrows point from inner cell faces into the lumen. A lower inset repeats the secretory direction. Text notes that bile begins in hepatocyte canaliculi and secretion helps adjust bile volume and composition. Gold AllHumanBody.com and full slogan finish the poster. Cell shapes, colors and arrows are schematic.
How to interpret this poster
- Arrows summarize secretion, not all transporters, fixed rates or identical behavior by every cholangiocyte.
- The duct is illustrative, not a specified caliber, species-specific section or complete biliary map.
- Ducts do not make all bile or bile salts. No exact pH, obstruction/surgery advice, supplement recommendation or connection that empties bile into blood.
- AI-assisted educational illustration; not physician certification, microscopy, a diagnosis or individualized medical advice.
- Fine annotations need enlargement; the full description provides an accessible text alternative.
- Display the full uncropped illustration; do not trim titles, legends or boundary annotations.
AI-assisted educational illustration, adapted into web-sized images without changing its composition. This is general education, not an individual diagnosis or treatment recommendation.
EVIDENCE / CONTEXT
Sources and what they support
- Biology of Cholangiocytes: From Bench to Bedside ↗
Bile-duct epithelial identity and ductal bicarbonate/water contribution to volume/composition.