Labels:text | sketch | drawing | clipart | cartoon | illustration OCR: B 1 B H H SECTIONAL PLAN OF THORAX AND ITS CONTENTS 'THROUGHOUT ITS GIRTH-PLACE). A. Heart. B. B. Lunge. C. E. D. F. Walls of the thorax. G. G. Pleura costalis. H. H. Pleura pulmonalis.