LIGHT AND ELECTRONMICROSCOPIC STUDIES ON THE FINE DISTRIBUTION OF LYMPHATICS OF BRONCHIAL ARTERY OF THE RABBIT / 解剖学报

ABSTRACT

Since the conventional dyes and puncture injection give no satisfactory effect in observing the pulmonary deep lymphatics, the author is inspired to introduce two new kinds of mixture, one is AgNO_3 with India ink, one is Riger's solution with India ink. Injections of the new mixtures directly into the artery, and the following findings are obtained. 1.With the lymphatic vessel related to the pulmonary artery as the main current, the pulmonary deep lymphatic vessels extend themselves to somewhere near the meta-arteriole while the lymphatic capillaries can be found around the inter-alveolar septa close to the terminal arterioles. 2.The pre-lymphovascular fluid pathway is carefully observed, which is described by Professor T. Kihara as of sponge like reticular fibres, around the lymphatic capillary blind sacs under the external base lamina propria of bronchioles. It is convinced that the lymphatic capillary, which is not yet found under the respiratory bronchiole membrane, starts where the final terminal bronchiole branches. 3.The fact that the valve is absent in the lymphatic vessel under the external membrane of both the bronchiole and the arteriole of related to the terminal bronchiolus shows that the lymphatic vessel farther off is capillary. 4.The tube of the pulmonary lymphatic capillary appears, under the microscope, irregular in shape where its endothelial cells, which are thin all over except for the part at the nuclei, have no pericytes and are lacking in the laminae or just have scattered ones. The cells are loosely joined in various ways and in some places they are separated by anchoring filaments.