. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. 334 ANATOMY OF THE RABBIT (a) Each pleural cavity (cavum pleurae) is a closed serous sac, the lining membrane, or pleura, being distributed over the costal surface as the costal pleura, partly over the anterior surface of the diaphragm as the diaphragmatic pleura, and over the surface of the lung as the pulmonary pleura, and entering into the formation of the mediastinum as the mediastinal pleura. A secondary fold on the right side of the mediastinal septum con- tains the
. Bensley's Practical anatomy of the rabbit : an elementary laboratory text-book in mammalian anatomy. Rabbits -- Anatomy. 334 ANATOMY OF THE RABBIT (a) Each pleural cavity (cavum pleurae) is a closed serous sac, the lining membrane, or pleura, being distributed over the costal surface as the costal pleura, partly over the anterior surface of the diaphragm as the diaphragmatic pleura, and over the surface of the lung as the pulmonary pleura, and entering into the formation of the mediastinum as the mediastinal pleura. A secondary fold on the right side of the mediastinal septum con- tains the inferior vena cava and forms a pocket in which lies the medial lobule of the inferior lobe of the right lung. The attachment of the posterior margin of the septum to the diaphragm is displaced to the left so that it and the secondary fold are approximately symmetrical and the pleural pocket is median. Posteriorly, the pulmonary pleura passes from the medial margin of the left lung and from the medial margins of both inferior lobules of the right lung to the mediastinal septum and backward to the diaphragm, forming the pulmonary ligament (lig. pulmonale). These relations may be understood more clearly by reference to a transverse section such as that represented diagrammatically in Fig. 113. {b) The lungs (pulmones) are paired expansible structures, the surfaces of which are free, except medially, where they are connected with the respiratory passages and the pulmonary blood-vessels, and posteromedially, where they are attached to the mediastinum and to the diaphragm by the pulmonary ligaments. (c) The right lung is divided by deep fissures into superior, middle, and inferior lobes, the inferior lobe consisting of a large lateral lobule and a smaller medial lobule, the last frequently further subdivided. The inferior caval vein passes between these lobules. The left lung is only about two . , r ,, • r . 1 • v. Fig. 114. Plan of the respiratory thirds Ot the size OI the right
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