黄缘闭壳龟消化系统、呼吸系统的解剖

黄缘闭壳龟消化管总长度为背甲长的3.5～4.2倍.食管和胃壁厚,扩展性强,内壁有数条纵行皱襞.小肠较长,约占消化管总长度的60.9%,无盲肠,肠内壁有大小不一的纵行皱襞.肝较大,为体重的4.8%左右.胰脏长条形,沿十二指肠分布.气管和支气管均由呈"O" 形完全闭合的软骨环和环间韧带所构成.气管较长,有45～55个软骨环;支气管较短,有30～40个软骨环.肺长囊形,蜂窝状,紧贴在背甲的内表面,从肩带一直延展到腰带.

Anatomy of the Digestive and Respiratory System of Cistoclemmys flavomarginata

In Cistoclemmys flavomarginata, the length of the whole digestive tract is 3.5～4.2 times as long as that of the carapace. The walls of the esophagus and stomach are thick and distensible, and there are several longitudinal folds on its inner wall. The small intestine is longer and its length is 60.9% of the whole digestive tract. There is no cecum. There are many longitudinal folds of varying sizes on the inner wall of the intestine. The large liver is 4.8% of the body weight. The pancreas is long and narrow and is distributed along the duodenum. The wall of the trachea and bronchi contains O-shaped cartilage rings. The trachea is long with 45～55 cartilaginous rings, while the bronchi are short with 30～40 cartilaginous rings. The saclike lungs are situated in the dorsal part of the coelom, extending from the pectoral girdle to the pelvic girdle.