. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. 566 Comparative Animal Physiology tions scattered locally over its musculature, the condition of "delirium ; Anodal polarization results in relaxation of the heart. The muscle of moUuscan and arthropod hearts is usually striated, some- times transversely and sharply, sometimes spirally and vi'eakly.^'^' In general the muscle Bbers of invertebrate hearts are shorter and less branched than those of vertebrate hearts. Molluscan and arthropod hearts differ strikingly from vertebrate hearts in their
. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. 566 Comparative Animal Physiology tions scattered locally over its musculature, the condition of "delirium ; Anodal polarization results in relaxation of the heart. The muscle of moUuscan and arthropod hearts is usually striated, some- times transversely and sharply, sometimes spirally and vi'eakly.^'^' In general the muscle Bbers of invertebrate hearts are shorter and less branched than those of vertebrate hearts. Molluscan and arthropod hearts differ strikingly from vertebrate hearts in their responses to electrical ;''^- "- The muscle of these hearts is excitable at all phases of the cycle, but the threshold is high in systole, approaching absolute refractoriness in early Fig. 211. Electrical stimulation at different times in the cardiac cycle of the frog heart. After Marey from ;^. 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 Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders
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