Germanà G, Marino F, Germanà A, Gilotti S, Macri B
Department of Morphology, Biochemistry, Physiology and Animal Production, Section of Morphology, University of Messina, Polo Universitario dell'Annunziata, 98168 Messina, Italy.
Ann Anat. 2003 Jun;185(3):217-21. doi: 10.1016/S0940-9602(03)80026-2.
Generally, in fishes the parietal pericardium is considered to be a semi-rigid structure. It is widely known that the entire parietal pericardium in fish, in contrast to that of higher vertebrates, is fixed to the body wall which consists mainly of skeletal muscle. This structural arrangement could explain the low end-systolic intrapericardial pressure in fishes. The morphology of the parietal pericardium of 11 sea-water teleosts, either free or breeding, coming from various areas of the southern Italy was studied. Macroscopical evaluation, but even more, histological and ultrastructural studies, showed some differences among the hearts of the examined subjects, more pronounced in the European hake (Merluccius merluccius, L.), in which a true pericardial sac was demonstrated, well differentiated and distinguishable from the other structures, in contrast to the observations in other subjects. The pericardial connective tissue showed no continuity with that of the surrounding structures, mainly skeletal muscle. This difference could be retraced to the well-known pattern of life and, therefore, to other individual as well as evolutionary factors in comparison with other teleosteans examined.
一般来说，鱼类的壁层心包被认为是一种半刚性结构。众所周知，与高等脊椎动物不同，鱼类的整个壁层心包固定在主要由骨骼肌组成的体壁上。这种结构安排可以解释鱼类心室内期末期心包内压力较低的现象。对来自意大利南部不同地区的11种海水硬骨鱼（无论处于自由状态还是繁殖状态）的壁层心包形态进行了研究。宏观评估，更重要的是组织学和超微结构研究表明，在所检查对象的心脏之间存在一些差异，在欧洲无须鳕（Merluccius merluccius, L.）中更为明显，在该物种中发现了一个真正的心包囊，与其他结构有明显区分且易于辨别，这与其他对象的观察结果不同。心包结缔组织与周围结构（主要是骨骼肌）的结缔组织没有连续性。这种差异可以追溯到众所周知的生活模式，因此，与其他被检查的硬骨鱼相比，还可归因于其他个体以及进化因素。
