. Elementary biology, animal and human. Biology. A = inspiration. B = expiration. Fig. 42. — Diagram to show changes in the size of the chest cavity during in- spiration and expiration. Ab = abdominal wall. D = diaphragm. St = breastbone. Tr = Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peabody, James Edward, b. 1869; Hunt, Arthur Ellsworth, joint author. New York, The Macmillan company

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1912