Comparative Histological Examination of the Integument of Odontocete Flukes
Comparative Histological Examination of the Integument of Odontocete Flukes
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DOI：
10.1578/am.46.4.2020.367
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发表时间：
2020-01-01
期刊：
影响因子：
1.2
通讯作者：
Fish, Frank E.
中科院分区：
文献类型：
--
作者：
Garten, Jennifer L.;Fish, Frank E.
鲸类动物的皮肤特别厚，在结构上与陆地哺乳动物的皮肤不同，因为它没有毛发、皮脂腺和发汗腺。鲸类动物的尾鳍是主要的推进结构，它受到的流体动力流和力不同于身体所经历的。基于吸虫的流体动力学功能，我们假设吸虫的被膜在组织学上不同于身体的被膜。对鲸类动物的被套进行了显微解剖，以确定吸虫和背体皮肤之间是否存在结构差异。从5种牙齿目（Delphinus delphis、Stenella coeruleoalba、trunsiops trunates、Kogia breviceps和Phocoena Phocoena）的背体和5个吸虫位置采集被皮标本，并进行光镜观察。吸虫背、背皮肤表皮厚度、真乳头高度差异有统计学意义；吸虫前缘的表皮厚度和毛乳头高度与其他部位相比存在差异。皮肤乳头深入到吸虫的许多部位，提示其功能与抵抗剪切力、细胞增殖、体温调节和触觉敏感有关。
Cetacean skin is noted for being exceptionally thick and being structurally different from the skin of terrestrial mammals in that it lacks hair, sebaceous glands, and sudoriferous glands. The caudal flukes of cetaceans are the primary propulsive structures, which are subjected to hydrodynamic flows and forces that differ from those experienced by the body. Based on the hydrodynamic function of the flukes, their integument is hypothesized to be histologically distinct from that of the body. The microanatomy of cetacean integument was examined to determine whether structural differences between the flukes arid dorsal body skin are present. Integument samples were collected from the dorsal body and five fluke locations for five odontocete species (Delphinus delphis, Stenella coeruleoalba, Tursiops truncates, Kogia breviceps, and Phocoena phocoena) and prepared for light microscopy. Statistically significant differences were observed in epidermal thickness and dermal papilla height between the dorsal skin arid skin of the fluke; and there were differences between epidermal thickness and dermal papilla height of the leading edge when compared to other locations on the fluke. Dermal papillae deeply penetrated many locations of the fluke, suggestive of functions associated with resisting shear forces, cell proliferation, thermoregulation, and tactile sensitivity.