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The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus. The GI tract contains all the major organs of the digestive system, in humans and other animals, including the esophagus , stomach , and intestines .
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.
The wall of the alimentary canal has four basic tissue layers: the mucosa, submucosa, muscularis, and serosa. gastrointestinal tract ; Native name: Tractus digestorius :
English: The gastrointestinal tract, also called the digestive tract, alimentary canal, or gut, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste.
The archenteron initially forms, and the mesoderm splits into two layers: the first attaches to the body wall or ectoderm, forming the parietal layer and the second surrounds the endoderm or alimentary canal forming the visceral layer. The space between the parietal layer and the visceral layer is known as the coelom or body cavity.
The crop (serial 4) of a pigeon (Columba livia) is prominently seen at the beginning of the alimentary canal. The crop (also the croup, the craw, the ingluvies, and the sublingual pouch) is a thin-walled, expanded portion of the alimentary tract, which is used for the storage of food before digestion.
More than 50,000 years ago, humans painted a hunting scene in a cave in Indonesia that archaeologists say represents the oldest known example of storytelling in art history.
Examples of monogastric omnivores include humans, pigs, hamsters and rats. Furthermore, there are monogastric carnivores such as cats . [ 1 ] A monogastric organism is contrasted with ruminant organisms (which have four-chambered complex stomachs), such as cattle , goats , and sheep .