Crop (anatomy)

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A crop is a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion that is found in many animals, including gastropods, earthworms^[1], leeches^[2], insects, and birds.

Contents 1 Bees 2 Birds 3 See also 4 References 5 External link

Bees

Cropping is used by bees to temporarily store nectar of flowers. When bees "suck" nectar, it is stored in their crop.^[3]

Birds

In a bird's digestive system, the crop is an expanded, muscular pouch near the gullet or throat. It is a part of the digestive tract, essentially an enlarged part of the esophagus. As with most other organisms that have a crop, the crop is used to temporarily store food. Not all birds have a crop. In adult doves and pigeons, the crop can produce crop milk to feed newly hatched birds.^[4]

See also

• Esophagus
• Proventriculus
• Gizzard

References

1. ↑ Worm World: About Earthworms- http://yucky.discovery.com/flash/worm/pg000102.html
2. ↑ R. T. Sawyer, Leach Biology and Behaviour, Volume II - http://www.biopharm-leeches.com/pdf/bioandbehav.pdf
3. ↑ Honeybee Biology - http://koning.ecsu.ctstateu.edu/Plants_Human/bees/bees.html
4. ↑ The Alimentary Canal in Birds - http://www.earthlife.net/birds/digestion.html

External link

• The Alimentary Canal in Birds

v • d • e Anatomy of torso, digestive system: Gastrointestinal tract
Upper GI: to stomach	Mouth • Pharynx (nasopharynx, oropharynx, hypopharynx) • Esophagus • Crop
Upper GI: stomach	rugae - gastric pits - cardia/gland - fundus/gland - pylorus/gland - pyloric antrum - pyloric canal - greater curvature - lesser curvature - angular incisure
Lower GI: intestines	Small intestine: Duodenum (Suspensory muscle, Major duodenal papilla, Minor duodenal papilla) • Duodenojejunal flexure • Jejunum • Ileum • continuous (intestinal villus, crypts of Lieberkühn, circular folds) Junction: Vermiform appendix • Ileocecal valve Large intestine: Cecum • Colon (ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon) • continuous (taenia coli, haustra, epiploic appendix)
Lower GI: termination	Rectum: Houston valve • rectal ampulla • pectinate line Anal canal: anal valves • anal sinuses • anal columns • Hilton's white line Anus: Sphincter ani internus muscle • Sphincter ani externus muscle
Lower GI: lymph	GALT: Peyer's patches (M cells)

de:Kropf eo:Kropolt:Gūžys fi:Kupu sv:kräva