COMPARATIVE MORPHOLOGY OF THE LUNG WITH SPECIAL REFERENCE TO THE ALVEOLAR LINING CELLS : II. LUNG OF THE REPTILIA

Abstract

1) Like amphibian lungs, the reptilian lungs consist of the " Vorbronchus" and primitive alveoli. 2) The primitive alveoli of the reptilian lungs are continuously covered with two kinds of epithelial cells, that is, alveolar epithelial cells and alveolar wall cells. 3) The alveolar epithelial cell has a cytoplasmic extension covering the alveolar wall but does not have microvilli or osmiophilic bodies. 4) The alveolar wall cell has microvilli and osmiophilic bodies but not a cytoplasmic extension.