. Animal and vegetable physiology, considered with reference to natural theology, by Peter Mark Roget ... Biology; Physiology; Plant physiology; Natural theology. 328 THE VITAL FUNCTIONS. and thus give greater purchase to the diaphragm. The muscles of the ribs are employed chiefly to give active assistance to the diaphragm, when, from any cause, a difficulty arises in dilating the chest. In Birds the mechanism of respiration pro- ceeds upon a different plan, of which an idea may be derived from the view given of the lungs. of the Ostrich, at l. Fig. 377. The construc- tion of the lungs of
. Animal and vegetable physiology, considered with reference to natural theology, by Peter Mark Roget ... Biology; Physiology; Plant physiology; Natural theology. 328 THE VITAL FUNCTIONS. and thus give greater purchase to the diaphragm. The muscles of the ribs are employed chiefly to give active assistance to the diaphragm, when, from any cause, a difficulty arises in dilating the chest. In Birds the mechanism of respiration pro- ceeds upon a different plan, of which an idea may be derived from the view given of the lungs. of the Ostrich, at l. Fig. 377. The construc- tion of the lungs of birds is such as not to admit of any change in their dimensions; for they are very compact in their texture, and are so closely braced to the ribs, and upper parts of the chest,. 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 Roget, Peter Mark, 1779-1869. London : W. Pickering
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