食管环;
Observation and nursing care of patients with esophageal varices treated by endoscopic single ring close loop ligature
内镜下单环密集套扎术治疗食管静脉曲张病人的观察及护理
Nervous system of Onchidiidae is compsed of a esophageal nerve ring and mouth ball ganglia, and on the esophageal nerve ring attached to a thin white vagina fibrosa with connective tissue.
4种石磺神经系统都是由食道神经环和口腔神经节构成,在神经环上附着一薄层白色稍透明的结缔组织纤维鞘。
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