PDF(Pubmed)
Abstract：
Dugongs are marine mammals with a crescent-shaped tail fluke and a concave trailing margin that belong to the family Dugongidae., They are distributed widely in the warm coastal waters of the Indo-Pacific region. Importantly, the population of dugongs has decreased over the past decades as they have been classified as rare marine mammals. Previous studies have investigated the habitat and genetic diversity of dugongs. However, a comprehensive histological investigation of their tissue has not yet been conducted. This study provides unique insight into the organs of dugongs and compares them with other mammal species.
Tissue sections were stained with Harris\'s hematoxylin and eosin Y. The histological structure of 17 organ tissues obtained from eight systems was included in this study. Tissue sections were obtained from the urinary system (kidney), muscular system (striated skeletal muscle and smooth muscle), cardiovascular system (cardiac muscle (ventricle), coronary artery, and coronary vein), respiratory system (trachea and lung), gastrointestinal system (esophagus, stomach, small intestine, liver, and pancreas), reproductive system (testis), lymphatic system (spleen and thymus), and endocrine system (pancreas).
While most structures were similar to those of other mammal species, there were some differences in the tissue sections of dugongs when compared with other mammalian species and manatees. These include the kidneys of dugongs, which were non-lobular and had a smooth, elongated exterior resulting in a long medullary crest, whereas the dugong pyloric epithelium did not have overlying stratified squamous cells and was noticably different from the Florida manatee.
Histological information obtained from various organs of the dugong can serve as an essential foundation of basal data for future microanatomical studies. This information can also be used as high-value data in the diagnosis and pathogenesis of sick dugongs or those with an unknown cause of death.
Tissue sections were stained with Harris\'s hematoxylin and eosin Y. The histological structure of 17 organ tissues obtained from eight systems was included in this study. Tissue sections were obtained from the urinary system (kidney), muscular system (striated skeletal muscle and smooth muscle), cardiovascular system (cardiac muscle (ventricle), coronary artery, and coronary vein), respiratory system (trachea and lung), gastrointestinal system (esophagus, stomach, small intestine, liver, and pancreas), reproductive system (testis), lymphatic system (spleen and thymus), and endocrine system (pancreas).
While most structures were similar to those of other mammal species, there were some differences in the tissue sections of dugongs when compared with other mammalian species and manatees. These include the kidneys of dugongs, which were non-lobular and had a smooth, elongated exterior resulting in a long medullary crest, whereas the dugong pyloric epithelium did not have overlying stratified squamous cells and was noticably different from the Florida manatee.
Histological information obtained from various organs of the dugong can serve as an essential foundation of basal data for future microanatomical studies. This information can also be used as high-value data in the diagnosis and pathogenesis of sick dugongs or those with an unknown cause of death.
摘要：
■儒艮是海洋哺乳动物，具有月牙形的尾吸虫和凹入的尾缘，属于Dugongidae家族。,它们广泛分布在印度洋-太平洋地区温暖的沿海水域。重要的是,在过去的几十年里，儒艮的数量已经减少，因为它们被归类为稀有的海洋哺乳动物。以前的研究已经调查了儒艮的栖息地和遗传多样性。然而,尚未对其组织进行全面的组织学研究。这项研究提供了对儒艮器官的独特见解，并将其与其他哺乳动物物种进行了比较。
■组织切片用Harris的苏木精和伊红Y染色。本研究包括从八个系统获得的17个器官组织的组织学结构。从泌尿系统（肾脏）获得组织切片，肌肉系统（横纹肌和平滑肌），心血管系统（心肌（心室），冠状动脉,和冠状静脉)，呼吸系统（气管和肺），胃肠道系统（食道，胃,小肠,肝脏,和胰腺），生殖系统（睾丸），淋巴系统（脾和胸腺），和内分泌系统（胰腺）。
■虽然大多数结构与其他哺乳动物相似，与其他哺乳动物和海牛相比，儒艮的组织切片有一些差异。这些包括儒艮的肾脏，它们是非小叶的，有光滑的，细长的外部导致长的髓峰，而儒艮幽门上皮没有上覆的复层鳞状细胞，并且与佛罗里达海牛明显不同。
■从儒艮各种器官获得的组织学信息可以作为未来显微解剖学研究的基础数据的重要基础。这些信息也可以用作诊断和发病机制的高价值数据。
■组织切片用Harris的苏木精和伊红Y染色。本研究包括从八个系统获得的17个器官组织的组织学结构。从泌尿系统（肾脏）获得组织切片，肌肉系统（横纹肌和平滑肌），心血管系统（心肌（心室），冠状动脉,和冠状静脉)，呼吸系统（气管和肺），胃肠道系统（食道，胃,小肠,肝脏,和胰腺），生殖系统（睾丸），淋巴系统（脾和胸腺），和内分泌系统（胰腺）。
■虽然大多数结构与其他哺乳动物相似，与其他哺乳动物和海牛相比，儒艮的组织切片有一些差异。这些包括儒艮的肾脏，它们是非小叶的，有光滑的，细长的外部导致长的髓峰，而儒艮幽门上皮没有上覆的复层鳞状细胞，并且与佛罗里达海牛明显不同。
■从儒艮各种器官获得的组织学信息可以作为未来显微解剖学研究的基础数据的重要基础。这些信息也可以用作诊断和发病机制的高价值数据。
