. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. THE RESPIRATORY SYSTEM. 403 oles affected through vaso-motor nerves in obedience to the medullary center which operates by their agency; and that. Fio. 320.—Tracings of blood-pressure in rabbit to show Traube-Hering curves (after Foster). The widest undulations indicate Traube Bering eiurves; those next in size, effects of respiration; and the smallest, of the pulse. when this center is disabled its subordinates in the spinal cord take upon them th
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. THE RESPIRATORY SYSTEM. 403 oles affected through vaso-motor nerves in obedience to the medullary center which operates by their agency; and that. Fio. 320.—Tracings of blood-pressure in rabbit to show Traube-Hering curves (after Foster). The widest undulations indicate Traube Bering eiurves; those next in size, effects of respiration; and the smallest, of the pulse. when this center is disabled its subordinates in the spinal cord take upon them the task. It has also been suggested that there may be a local vaso-motor mechanism acted upon by the ve- nous blood or that the muscle-cells themselves may be influ- enced by the unnatural condition of the blood in asphyxia. These curves, however, also appear during respiration that deviates but little from the normal. It is to be borne in mind that the tracings on which we have based our reasoning do not represent what takes place in every mode of breathing. The subject is one of great com- plexity. Doubtless mechanical explanations go a long way here, but they are so mixed up with factors that play a part more or less prominent, though difficult to isolate in individual instances, and in no wise to be explained as other than vital effects, that one must exercise the usual caution; the more so as it is found upon actual experiment that the outcome, as regards blood-pressure, is not always quite what would have been expected, reasoning from the principles of physics alone. That there are rhythms within rhythms in the vascular and respiratory system, rendering the subject complex beyond the power of experiments fully to unravel, is a conviction that we think will deepen in the minds of 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 n
Size: 1986px × 1258px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1880, bookyear1889
