. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. nd oorreBpond' under the cir- esirable blank, (e of the actual itions we shall leart may cease which seem to at is, the heart made evident rhythm which : on events that y may be con- tudent to verify vet observation oner. The fol- I pulsations per Old Age. 82-88 5&-60 40-4S 05-60 06-60 60-70 100-120 le oz, are as fol- Id. i old hs old .. )W ^old ox. •2-182 100-120 68 64 56-68
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. nd oorreBpond' under the cir- esirable blank, (e of the actual itions we shall leart may cease which seem to at is, the heart made evident rhythm which : on events that y may be con- tudent to verify vet observation oner. The fol- I pulsations per Old Age. 82-88 5&-60 40-4S 05-60 06-60 60-70 100-120 le oz, are as fol- Id. i old hs old .. )W ^old ox. •2-182 100-120 68 64 56-68 46 40 TUB CIRCULATION OP THE BLOOD. TBB PDLSB. 241 Naturally the intermittent action of the heart gives rise to corresponding phenomena in the elastic tubes into which it may be said to be continued, for it is very desirable to keep in mind the complete continuity of the vascular system. The following phenomena are easy of observation: When a finger-tip is laid on any artery, an interrupted pressure is felt; if the vessel be laid bare (or observed in an old man), it may be seen to be moved in its bed forward and upward ; the press- ure is less the farther the artery from the heart; if the vessel be opened, blood flows from it continuously, but in spurts; if one finger be laid on the carotid and another on a distant ves- sel, as one of the arteries of the foot, it may be observed (though it is not easy from difiiculty in attending to two events hap- pening so very close together) that the beat in the nearer ves- sel precedes by a slight interval that in the more distant Inv^ K igating the latter phenomenon with instnmients, it is found tuat an appreciable iuter\-al, d'^'^f^nding on the distance apart of the points observed, interven a. What is the explanation of these facts ? The student may get at this by a few additional observa- tions that can be easily Pio. S0&—Marev'g apMratna for ahowing the mode in which the polae is proDaoated m the arteries. B, a robb
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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890
