respiratory tube 呼吸管 trachea 气管 AAO:0010140 An elongated tube which carries air to and from the lungs.[AAO] BTO:0001388 CALOHA:TS-1060 EFO:0000935 EHDAA2:0002066 EHDAA:3078 EMAPA:16853 EV:0100040 FMA:7394 GAID:361 In birds, the trachea runs from the pharynx to the syrinx, from which the primary bronchi diverge. Swans have an unusually elongated trachea, part of which is coiled beneath the sternum; this may act as a resonator to amplify sound. In some birds, the cartilagenous rings are complete, and may even be ossified. In amphibians, the trachea is normally extremely short, and leads directly into the lungs, without clear primary bronchi. A longer trachea is, however found in some long-necked salamanders, and in caecilians. While there are irregular cartilagenous nodules on the amphibian trachea, these do not form the rings found in amniotes. The only vertebrate to have lungs, but no trachea, is Polypterus, in which the lungs arise directly from the pharynx. In primitive fishes and most tetrapods, the lungs of adults are usually paired. They lie ventral to the digestive tract and are connected to the outside environment through the trachea.[well established][VHOG] MA:0000441 MAT:0000137 MESH:D014132 MIAA:0000137 OpenCyc:Mx4rvViOX5wpEbGdrcN5Y29ycA The respiratory tube between the larynx and the bronchi. [Bemis_WE, Functional_Anatomy_of_the_Vertebrates:_An_Evolutionary_Perspective, Glossary_G-29, Grande_L, Liem_KF, Third_Edition_(2001)_Orlando_Fla.:_Harcourt_College_Publishers, Walker_WF][VHOG] The trachea is the portion of the airway that attaches to the bronchi as it branches [GO:dph]. UBERON:0003126 UMLS:C0040578 VHOG:0000371 XAO:0000118 cartilaginous trachea in mouse 15-18 C-rings, 15-20 in human. tracheal tracheal tubule uberon vertebrate trachea windpipe 一根细长的管子，其用来运送空气进出肺部。 喉与支气管之间的呼吸管。 [Bemis_WE，Functional_Anatomy_of_the_Vertebrates：_An_Evolutionary_Perspective，Glossary_G-29，Grande_L，Liem_KF，Third_Edition_（2001）_Orlando_Fla _ Harcourt_College_Publishers，Walker_WF] [VHOG] 在原始鱼类和大多数四足动物中，成体的肺通常是成对的。它们位于消化道的腹侧，通过气管与外界环境相连。[well established][VHOG] 在鸟类中，气管从咽部延伸到咽管，而初级支气管从咽管分叉。天鹅有一个异常细长的气管，其一部分盘绕在胸骨下面；这可能作为一个谐振器来放大声音。在一些鸟类中，软骨环是完整的，甚至可能是骨化的。在两栖动物中，气管通常非常短，直接通向肺，没有清晰的原发支气管。然而，在一些长颈蝾螈和轮虫中发现了较长的气管。虽然两栖类气管上有不规则的软骨结节，但这些结节并不形成羊膜动物中的环。唯一有肺但没有气管的脊椎动物是息肉，其中肺直接来自咽部。 小气管 小鼠15-18个C环，人15-20个。 气管 气管 气管是支气管的一部分，其附着在支气管上[GO：dph]。 脊椎动物气管 软骨气管