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Gallbladder · Visual journey
When bile no longer stays dissolved.
From the body to a concentrated solution, until cholesterol turns into stone.
Begin the journeyScroll to change scale
Organ
Below the liver.
The gallbladder is a small sac. The liver makes bile; the gallbladder stores it and releases it into the intestine when we eat.
Wall and epithelium
The bile becomes concentrated.
The epithelium, the cell layer lining the inside, absorbs water and ions. The components of bile become concentrated in less fluid.
Molecular change
Supersaturated cholesterol.
There is so much cholesterol that bile can no longer keep it dissolved. Cholesterol precipitates as solid crystals. Here you see real crystals under polarized light.
This sample is joint fluid and is used only to recognize the shape of cholesterol crystals, not as a bile sample.See the crystallizationOutcome
Cholelithiasis.
The crystals become trapped in mucin, the gel coating the wall. If the gallbladder empties slowly, they have time to cluster and grow into gallstones. That is cholelithiasis.
The sequence locates the gallbladder below the liver, shows its normal wall, explains how it concentrates bile, and follows cholesterol precipitation into a gallstone.
From stone to inflammation
See what changes in the wall.
A stone inside the gallbladder is cholelithiasis. If a stone blocks the outlet, the wall can become inflamed: that is acute cholecystitis.
Unremarkable wallEpitheliumThe epithelium forms an orderly band over the folds of the lining. This is the reference for locating where the bile was.
ColelitiasisStone fragmentDark fragments occupy the space that previously contained liquid bile. The same gallbladder epithelium remains recognizable beneath them.
Colecistitis agudaNeutrophilsNeutrophils, rapidly responding white blood cells, accumulate between the cells. That inflammation of the gallbladder is acute cholecystitis.
Medical transparencySources and scope
Medical evidence, visual provenance, and editorial transformations for this journey.
- Body anatomical model .. Human Reference Atlas, NIH 3D, CC BY 4.0
- Anatomy of the liver, gallbladder, and ducts .. OpenStax College, CC BY 3.0
- Histology of an unremarkable gallbladder .. Nephron, CC BY-SA 3.0
- Histology of cholelithiasis .. Mikael Häggström, M.D., CC0 1.0
- Histology of acute cholecystitis with neutrophils .. Mikael Häggström, M.D., CC0 1.0
- Micrograph of cholesterol crystals under polarized light .. Ed Uthman, M.D., CC BY 3.0
- Opened gallbladder with stones .. Alex Khimich, Public domain
- Location, storage, and release of bile .. NIDDK
- Epithelium, water absorption, and bile concentration .. OpenStax
- Cholesterol supersaturation and crystal precipitation .. Wang et al., review in PMC
- Mucin, stasis, and crystal growth .. Wang et al., review in PMC
- Definition of gallstones and cholelithiasis .. NIDDK
- Stone obstruction and acute cholecystitis .. NCBI Bookshelf
- Silent gallstones .. NIDDK
- Pain when a stone blocks a duct .. NIDDK
The underlying anatomy comes from OpenStax. Labels, lines, the background, and oval marks within the lumen were removed because they could resemble stones too early in the story. The liver, gallbladder, wall, and ducts were not redrawn.
The crystallization stage uses a real micrograph of cholesterol crystals in joint fluid as a shape reference; it is not presented as a bile sample. The comparison that follows uses real gallbladder specimens to distinguish cholelithiasis from acute cholecystitis.
Sources verified through August 25, 2026.
