Gastrolith

（重定向自Stomach stone）

Gastroliths from Jurassic strata near Starr Springs, Utah.

Axolotl seek out and swallow gravel to create gastroliths (as visible in this x-ray of a living animal). X-rayed multiple times during a two-year research project, this normal, healthy adult Axolotl (26.3cm, 159.5 gm) was retired and lived for several more years.

A diplodocid ingesting gastroliths entangled in vegetation it is consuming

A gastrolith, also called a stomach stone or gizzard stones, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In other species the rocks are ingested and pass through the digestive system and are frequently replaced. The grain size depends upon the size of the animal and the gastrolith's role in digestion. Other species use gastroliths as ballast. Particles ranging in size from sand to cobbles have been documented.

单词	Stomach stone
释义	Stomach stone 原声例句古生物科普 And sprinkled among the stomach stones were fish scales and vertebrae. 在胃结石中撒着鱼鳞和椎骨。英语百科 Gastrolith （重定向自Stomach stone） A gastrolith, also called a stomach stone or gizzard stones, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In other species the rocks are ingested and pass through the digestive system and are frequently replaced. The grain size depends upon the size of the animal and the gastrolith's role in digestion. Other species use gastroliths as ballast. Particles ranging in size from sand to cobbles have been documented.
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