ORIGIN AND DISTRIBUTION OF THE CELIAC ARTERY IN YELLOW-TOOTHED CAVIES (Galea spixii Wagler, 1831)

Abstract For this study we used 20 animals that were in the freezer at the Wild Animals Multiplication Center (CEMAS/UFERSA). The animals were thawed, the abdominal cavity was opened, and the thoracic aorta cannulated caudally for the injection of red-stained latex Neoprene 650, and then fixed in formaldehyde solution 10%, for a minimum of 48 hours. Then the animals were dissected, photographed, and the results analyzed. The celiac artery originated from the abdominal aorta and issued the left gastric, splenic, and hepatic arteries. The left gastric artery issued two to three branches to the lesser curvature of the stomach. The splenic artery emitted four branches to the parenchyma of the spleen, six to twelve pancreatic branches and the left gastroepiploic artery. The hepatic artery emitted from one to two pancreatic branches and forked in a short trunk formed by right gastric and own hepatic arteries and in the gastroduodenal artery, which originated the cranial pancreaticoduodenal and right gastroepiploic. The trifurcation behavior of the celiac artery of the yellow-toothed cavy is similar to that found in rodents such as nutria, agouti, hamsters and mice, suggesting that this is the standard for the order.

摘要 本研究使用了野生动物繁殖中心（Wild Animals Multiplication Center，CEMAS/UFERSA）冷冻保存的20只实验动物。将动物解冻后，打开腹腔，于胸主动脉行尾侧插管以注射红色染色氯丁橡胶（Neoprene 650）乳胶，随后以10%甲醛溶液固定至少48小时。之后对动物进行解剖、摄影并开展结果分析。腹腔动脉起自腹主动脉，分出胃左动脉、脾动脉与肝动脉。胃左动脉发出2~3支分支分布于胃小弯。脾动脉发出4支脾实质分支、6~12支胰支及胃网膜左动脉。肝动脉发出1~2支胰支，并分叉为两支：一支为胃右动脉与肝固有动脉共同构成的短干，另一支为胃十二指肠动脉；胃十二指肠动脉发出颅侧胰十二指肠动脉与胃网膜右动脉。黄齿豚鼠腹腔动脉的三分叉形态与海狸鼠、刺豚鼠、仓鼠及小鼠等啮齿类动物的特征相似，提示该形态为啮齿目的典型模式。