ventral aorta

ventral aorta

[′ven·trəl ā′ȯrd·ə]
(vertebrate zoology)
The arterial trunk or trunks between the heart and the first aortic arch in embryos or lower vertebrates.
References in periodicals archive ?
The samples selected to be treated were brain, eyes, heart, proximal end of the ventral aorta (attached to the heart), kidneys, testis, and a block consisting of the distal part of the oesophagus, stomach, intestine, spleen and pancreas.
Material Total length (mm) Maximum width (mm) Li Lf Wi Wf Right eye * 11.88 11.40 7.82 7.00 Heart: sinus venosus 9.80 7.95 7.23 5.99 atrium 9.50 8.22 9.10 8.07 ventricle 12.13 10.57 17.31 15.08 conus arteriosus 5.01 4.59 4.97 4.56 Ventral aorta 6.32 5.95 3.77 3.53 Stomach 96.78 87.86 22.48 18.13 Proximal intestine 37.46 34.64 4.35 4.14 Valvular intestine 89.85 71.39 17.92 15.66 Rectum 21.43 17.14 4.68 3.85 Spleen ** -- -- 19.84 16.43 Pancreas 25.28 24.87 6.59 5.28 Deferent duct *** 115.47 111.67 -- -- Right testis 82.39 61.47 9.52 7.09 Right kidney 59.26 51.01 8.49 7.46 Trunk section * 27.32 32.56 21.58 20.07 * Maximum height was measured instead the parameters width (eye) and length (trunk section).
This can explain embryologically since the external carotid artery arises mainly from the ventral aorta and internal carotid artery arises mainly from the dorsal aorta (Datta.
Functional characterization of a muscarinic receptor in the smooth muscle of the shark (Squalus acanthias) ventral aorta. Experimental Biology Online, vol.
A prostaglandin, not NO, mediates endothelium-dependent dilation in ventral aorta of shark (Squalus acanthias).
Distinguished from all congeners by the slender body, depth at PCD 2.9% TL, paired and median ventral nasal sinus papillae, and presence of 10 afferent branchial arteries on the medial ventral aorta. It is further characterized by the combination of the following characters: slime pores--prebranchial 18, branchial 12, trunk 70, caudal 19, total 119; gill pouches (GP) and gill apertures (GA) 12, PCD widely separated from the opening of posterior left GAs; multicusps in anterior row 3 and multicusps in posterior row 2, total cusps 46; paired dorsal nasal sinus papillae; eyespot absent; body coloration pink.
Ventral aorta (VA) bifurcating at an anterior position between 2nd and 3rd GP (counted from the snout toward the heart).
Branching of the ventral aorta (VA) is considered synapomorphic for Eptatretinae (Mok and McMillan, 2004), in contrast to the plesiomorphic unbranched condition in Myxininae.
Bifurcating pattern of the ventral aorta and distribution of the branchial arteries of hagfishes (Myxiniformes), with notes on the taxonomic implications.