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Structure and function of respiratory turbinates in phocid seals

机译：封皮中呼吸鼻甲的结构和功能

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In terrestrial mammals, the respiratory turbinate bones within the nasal cavity are employed to conserve heat and water. In order to investigate whether environmental temperature affects respiratory turbinate structure in phocids, we used micro-computed tomography to compare maxilloturbinate bone morphology in polar seals, grey seals and monk seals. The maxilloturbinates of polar seals have much higher surface areas than those of monk seals, the result of the polar seals having more densely packed, complex turbinates within larger nasal cavities. Grey seals were intermediate; a juvenile of this species proved to have more densely packed maxilloturbinates with shorter branch lengths than a conspecific adult. Fractal dimension in the densest part of the maxilloturbinate mass was very close to 2 in all seals, indicating that these convoluted bones evenly fill the available space. The much more elaborate maxilloturbinate systems in polar seals, compared with monk seals, are consistent with a greater need to limit respiratory heat loss.
机译：在陆生哺乳动物中，鼻腔内的鼻甲骨被用来保存热量和水。为了研究环境温度是否会影响phophids的呼吸鼻甲结构，我们使用了计算机断层扫描技术来比较极地海豹，灰海豹和僧侣海豹的最大鼻甲骨形态。极性海豹的大鼻甲比和尚海豹的表面积大得多，这是由于极性海豹在较大的鼻腔内有更密集的，复杂的鼻甲。灰色的海豹在中间。事实证明，与同种成年相比，该物种的幼虫具有更密集的上颌鼻甲虫，分支长度较短。在所有海豹中，最大鼻甲状体质量最密部分的分形维数非常接近2，这表明这些回旋的骨头均匀地填充了可用空间。与僧侣海豹相比，极地海豹中更复杂的上颌甲鼻甲系统符合限制呼吸热散失的更大需求。

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