A. Bird's urine is much more "compact" than ours, so they are able to conserve water that way. Buccal cavity: chamber of the mouth. The Crop The crop is a sac that extends off the esophagus that is for storing food. As nouns the difference between crop and gizzard is that crop is a plant, especially a cereal, grown to be harvested as food, livestock fodder or fuel or for any other economic purpose while gizzard is a portion of the esophagus of either a bird or an annelid that contains ingested grit and is used to grind up ingested food before it is transferred to the stomach. Then it moves into the stomach or proventriculus and gets soaked with digestive juices, before finally getting "chewed" in the gizzard.

Birds that present damage to the walls of the gizzard, begin to suffer from malnutrition and eventually die (Loon, 2005). The gizzard is used to grind up coarse hard grain; as for the crop, it serves as a bird's "doggie bag", allowing it to store excess food for later consumption. Swallowing is accomplished by esophageal peristalsis, and in most birds appears to be aided by extension of the neck. A crop (sometimes also called a croup or a craw, or ingluvies) is a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion.This anatomical structure is found in a wide variety of animals. I have answers from Wikipedia, anawers.com, an all about birds website and others Q. It has been found in birds, and in invertebrate animals including gastropods (snails and slugs), earthworms, leeches, and insects. Crop: pocket formed by the bulding of the esophagus. Liver: bile-producing digestive gland. What we call a gizzard is the muscular part of a bird's stomach. Ventriculus gastric mill, or gizzard, is a kind of muscular stomach found in birds and earthworms, as well as some types of fish and reptiles. By Matthew A. Boreau | Submitted On August 21, 2012. Heart: blood-pumping organ. It has been reported in chicken that the gizzard functions to grind food, and similar microbial communities were found in the crop and gizzard . The gizzard is more acidic than the crop, which implies that the majority of food breakdown occurs in the gizzard, as opposed to the crop. Gizzard definition, a thick-walled, muscular pouch in the lower stomach of many birds and reptiles that grinds food, often with the aid of ingested stones or grit. When a bird swallows food, it goes from the throat to the esophagus. See more. The gizzard is the lump of muscle that grinds the food of the chicken. To accomplish what the gizzard does, it absolutely must be tough, for the gizzard's main function is to grind and digest tough food. While the general digestive tract is the same for all birds, the size and shape of different organs, particularly the crop and gizzard, also vary for different bird species. In essence, the action of the gizzard acts as a replacement for chewing with teeth.

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