aorta 大动脉 AAO:0010213 All amniotes have a broadly similar arrangement to that of humans, albeit with a number of individual variations. In fish, however, there are two separate vessels referred to as aortas. The ventral aorta carries de-oxygenated blood from the heart to the gills; part of this vessel forms the ascending aorta in tetrapods (the remainder forms the pulmonary artery). A second, dorsal aorta carries oxygenated blood from the gills to the rest of the body, and is homologous with the descending aorta of tetrapods. The two aortas are connected by a number of vessels, one passing through each of the gills. Amphibians also retain the fifth connecting vessel, so that the aorta has two parallel arches BTO:0000135 CALOHA:TS-0046 EFO:0000265 EMAPA:18601 EV:0100027 FMA:3734 GAID:469 MA:0000062 MAT:0000035 MESH:D001011 MIAA:0000035 OpenCyc:Mx4rvVjvTpwpEbGdrcN5Y29ycA The main artery of the circulatory system which carries oxygenated blood from the heart to all the arteries of the body except those of the lungs.[AAO] The main trunk of the systemic arterial system that carries blood from the heart to all the organs and other structures of the body, bringing oxygenated blood to all parts of the body in the systemic circulation This class is currently a mixed bag, encompassing (1) the entirety of the mammalian aorta together with (2) the developmental and phylogenetic homologs of its segments: the ventral aorta and dorsal aortae. UBERON:0000947 UMLS:C0003483 VHOG:0001523 When vertebrates first appeared, they must have possessed a ventral and dorsal aorta with aortic arches between them.[well established][VHOG] XAO:0003010 aortic arteria maxima dorsal aorta galen:Aorta trunk of aortic tree trunk of systemic arterial tree uberon 主动脉的 主动脉躯干 全身动脉主干 全身动脉系统的主干，将血液从心脏输送到身体的所有器官和其他结构，将氧合血液带到体循环中身体的各个部位 动脉最大值 循环系统的主要动脉，其将含氧的血液从心脏输送到身体的所有动脉，除了肺部的动脉。 所有羊膜都有与人类大体相似的排列方式，尽管有一些个体差异。然而，在鱼类中，有两个独立的血管被称为主动脉。腹主动脉将脱氧血液从心脏输送到鳃；血管的一部分形成四足升主动脉（其余部分形成肺动脉）。第二，背主动脉将含氧的血液从鳃运送到身体的其余部分，并且与四足动物的降主动脉同源。两个主动脉由许多血管连接，穿过每只鳃。两栖动物也保留第五个连接血管，因此主动脉具有两个平行的弓形。 背主动脉 脊椎动物首次出现时，它们一定有腹主动脉和背主动脉，其间有主动脉弓。 这个类目前是一个混杂包，包括（1）整个哺乳动物主动脉连同（2）其发展和系统发育同系的部分：腹主动脉和背主动脉。 blood vessel 血管 arterial blood vessel 动脉血管 great vessel of heart 心脏大血管