van Soldt Benjamin J, Danielsen Carl Christian, Wang Tobias
Department of Bioscience, Zoophysiology, University of Aarhus, C.F. Møllers Allé 3, Aarhus C, 8000, Denmark.
Department of Genetics and Development, Columbia University Medical Center, New York, New York.
J Morphol. 2015 Dec;276(12):1412-21. doi: 10.1002/jmor.20429. Epub 2015 Aug 12.
Pythons are unique amongst snakes in having different pressures in the aortas and pulmonary arteries because of intraventricular pressure separation. In this study, we investigate whether this correlates with different blood vessel strength in the ball python Python regius. We excised segments from the left, right, and dorsal aortas, and from the two pulmonary arteries. These were subjected to tensile testing. We show that the aortic vessel wall is significantly stronger than the pulmonary artery wall in P. regius. Gross morphological characteristics (vessel wall thickness and correlated absolute amount of collagen content) are likely the most influential factors. Collagen fiber thickness and orientation are likely to have an effect, though the effect of collagen fiber type and cross-links between fibers will need further study.
蟒蛇在蛇类中独一无二，由于心室内压力分离，其主动脉和肺动脉的压力不同。在本研究中，我们调查这是否与球蟒（球蟒）不同的血管强度相关。我们从左、右和背主动脉以及两条肺动脉中切取节段。对这些节段进行拉伸测试。我们发现，球蟒的主动脉血管壁明显比肺动脉壁更强。大体形态特征（血管壁厚度和相关的胶原蛋白绝对含量）可能是最有影响力的因素。胶原纤维的厚度和取向可能有影响，不过胶原纤维类型和纤维间交联的影响还需要进一步研究。
