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The gastrointestinal tract 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. Food taken in through the mouth is digested to extract nutrients and absorb energy, and the waste expelled at the anus as faeces. Gastrointestinal is an adjective meaning of or pertaining to the stomach and intestines.
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A dik-dik is the name for any of four species of small antelope in the genus Madoqua that live in the bushlands of eastern and southern Africa.
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The crop is a thin-walled, expanded portion of the alimentary tract, which is used for the storage of food before digestion. The gizzard is an anatomical structure in vertebrate animals, such as birds, and invertebrate animals, such as gastropods, earthworms, leeches, and insects.
Candidatus Epulopiscium is a genus of Gram-positive bacteria that have a symbiotic relationship with surgeonfish. These bacteria are known for their unusually large size, many ranging from 0.2 - 0.7 mm in length. Until the discovery of Thiomargarita namibiensis in 1999, Epulonipiscium species were thought to be the largest bacteria. They are still the largest known heterotrophic bacteria.
The term coldwater fish can have different meanings in different contexts.
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Erpobdellidae is a family of leeches. It is one of the four families belonging to the suborder Erpobdelliformes of the proboscisless leeches order, Arhynchobdellida.
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The femoral chordotonal organ is a group of mechanosensory neurons found in an insect leg that detects the movements and the position of the femur/tibia joint. It is thought to function as a proprioceptor that is critical for precise control of leg position by sending the information regarding the femur/tibia joint to the motor circuits in the ventral nerve cord and the brain
References
- ↑ Mark E. Siddall (2002). "Phylogeny of the leech family Erpobdellidae (Hirudinida : Oligochaeta)" (PDF). Invertebrate Systematics. 16: 1–6. doi:10.1071/IT01011.
- ↑ Mas, IG; Lopez, FM; Mora, AMP; Ortega, GT (1998). "The freshwater leeches (Annelida, Hirudinea) of Valencian Community (Spain)". Boletin de la Real Sociedad Espanola de Historia Natural (Seccion Biologica). 94 (1–2): 149–161.
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- ↑ Oka, Kazuyuki; Takeda, Naokuni (1986-01-01). "Relationship between neurosecretion and spermatogenesis in the leech, Erpobdella lineata". Comparative Biochemistry and Physiology Part A: Physiology. 84 (3): 421–425. doi:10.1016/0300-9629(86)90340-3. ISSN 0300-9629.
- ↑ Chang, N. S. (1994). "Ultrastructure of the digestive tract of Korean Leech (Erpobdella lineata)". Applied Microscopy. 24 (3): 34–45. ISSN 2287-5123.