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Gizzard of a chicken. The gizzard, also referred to as the ventriculus, gastric mill, and gigerium, is an organ found in the digestive tract of some animals, including archosaurs (birds and other dinosaurs, crocodiles, alligators, pterosaurs), earthworms, some gastropods, some fish, and some crustaceans.
A gastrolith, also called a stomach stone or gizzard stone, 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 proventriculus is a standard part of avian anatomy, and is a rod shaped organ, located between the esophagus and the gizzard of most birds. [2] It is generally a glandular part of the stomach that may store and/or commence digestion of food before it progresses to the gizzard. [3]
The gizzard of some species of herbivorous birds, like turkey and quails, [66] contains small pieces of grit or stone called gastroliths that are swallowed by the bird to aid in the grinding process, serving the function of teeth. The use of gizzard stones is a similarity found between birds and dinosaurs, which left gastroliths as trace ...
A Murky Shade Of Death: King Gizzard And The Lizard Wizard Conjures A Heavy Metal Concept Album Read More » T. The horizon is as black as coal. Cars crash and explode as stunned motorists drive ...
The gizzard of red-necked stints and red knots is more than ten times larger than the proventriculus. The size of the gizzard is adaptable in these shore birds, becoming atrophied when soft food items like worms are consumed and increasing in size and muscularity following prolonged consumption of snails, cockles or mussels.
These do not dissolve in the bird's digestive system; instead, they remain in the gizzard for weeks or months to help the bird grind up its food for digestion. Stones used may include quartz, granite, feldspar, and phosphate rock. [3] Insoluble grit is found in the gizzards of birds that eat plant parts and some that eat invertebrates. Because ...
The digestive system of birds is unique, with a crop for storage and a gizzard that contains swallowed stones for grinding food to compensate for the lack of teeth. [147] Some species such as pigeons and some psittacine species do not have a gallbladder. [148] Most birds are highly adapted for rapid digestion to aid with flight. [149]