Klein Wilfried, Abe Augusto S, Andrade Denis V, Perry Steven F
Institut für Zoologie, Universität Bonn, 53115 Bonn, Germany.
J Morphol. 2003 Nov;258(2):151-7. doi: 10.1002/jmor.10136.
The posthepatic septum (PHS) divides the body cavity of Tupinambis merianae into two parts: the cranial one containing the lungs and liver and the caudal one containing the remaining viscera. The PHS is composed of layers of collagenous fibers and bundles of smooth muscle, neither of which show systematic orientation, as well as isolated blood vessels, lymphatic vessels, and nerves. Striated muscle of the abdominal wall does not invade the PHS. The contractions of the smooth muscles may stabilize the pleurohepatic cavity under conditions of elevated aerobic needs rather than supporting breathing on a breath-by-breath basis. Surgical removal of the PHS changes the anatomical arrangement of the viscera significantly, with stomach and intestine invading the former pleurohepatic cavity and reducing the space for the lungs. Thus, the PHS is essential to maintain the visceral topography in Tupinambis.
肝后隔膜（PHS）将美索不达米亚鬃狮蜥的体腔分为两部分：头侧部分包含肺和肝脏，尾侧部分包含其余内脏。PHS由胶原纤维层和平滑肌束组成，两者均无系统的排列方向，此外还有孤立的血管、淋巴管和神经。腹壁的横纹肌不会侵入PHS。在有氧需求增加的情况下，平滑肌的收缩可能会稳定胸膜肝腔，而不是逐次支持呼吸。手术切除PHS会显著改变内脏的解剖结构，胃和肠会侵入先前的胸膜肝腔，减少肺部的空间。因此，PHS对于维持美索不达米亚鬃狮蜥的内脏形态至关重要。
