Related Directory Categories
- Field Crops (306)
- Field Crops (204)
- Seed (151)
- Cereals (108)
- Crop Circles (96)
- Fiber Crops (54)
- Root Crops (50)
- Anatomy (44)
- Legumes (33)
- Corn (33)
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Crop (anatomy)
From Wikipedia, the free encyclopedia
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.
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Cropping is used by bees to temporarily store nectar of flowers. When bees "suck" nectar, it is stored in their crop.[3]
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]
- ^ Worm World: About Earthworms- http://yucky.discovery.com/flash/worm/pg000102.html
- ^ R. T. Sawyer, Leach Biology and Behaviour, Volume II - http://www.biopharm-leeches.com/pdf/bioandbehav.pdf
- ^ Honeybee Biology - http://koning.ecsu.ctstateu.edu/Plants_Human/bees/bees.html
- ^ The Alimentary Canal in Birds - http://www.earthlife.net/birds/digestion.html
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| 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 - greater curvature - lesser curvature |
| Lower GI: intestines | Small intestine: Duodenum (Suspensory muscle, Major duodenal papilla, Minor duodenal papilla) • Duodenojejunal flexure • Jejunum • Ileum
Vermiform appendix • Ileocecal valve Large intestine: Cecum • Colon (ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon) |
| Lower GI: after intestines | Rectum (Houston valve, rectal ampulla, pectinate line) • Anal canal (anal valves, anal sinuses, anal columns) - Anus: Sphincter ani internus muscle • Sphincter ani externus muscle |
| Lower GI: continuous | GALT: Peyer's patches • M cells - intestinal villus • crypts of Lieberkühn • circular folds • taenia coli • haustra • epiploic appendix |
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