The essentials of healthA text-book of anatomy, physiology, hygiene, alcohol, and narcotics . y animalsthe red corpuscles are of the same shape as in the one single exception, the camelidae, this is trueof all the mammalia, — as the horse, sheep, ox, hog,and dog. While the red corpuscles of these animals areof the same shape, yet many of them differ in size. Inmany of these animals the red corpuscles are so muchsmaller than those in man that it is sometimes possibleto tell whether the corpuscles found in a blood stain are those of man or of some loweranimal. To determine this re-quire
The essentials of healthA text-book of anatomy, physiology, hygiene, alcohol, and narcotics . y animalsthe red corpuscles are of the same shape as in the one single exception, the camelidae, this is trueof all the mammalia, — as the horse, sheep, ox, hog,and dog. While the red corpuscles of these animals areof the same shape, yet many of them differ in size. Inmany of these animals the red corpuscles are so muchsmaller than those in man that it is sometimes possibleto tell whether the corpuscles found in a blood stain are those of man or of some loweranimal. To determine this re-quires the very highest powersof the microscope, very delicatemeasuring instruments, and alsogreat skill in their use. It is notalways possible to tell humanblood from the blood of othermammalia, but it is possible to doso in certain cases. Many of the lower animals havered corpuscles of different shapefrom those of man. They arealso larger and of different structure. The red cor-puscles of the blood of birds, fishes, reptiles, frogs, andtoads are oval in shape, and much larger than those of. Fig. 27. Frogs blood,highly magnified : (a) thewhite corpuscles ; (b) thenucleated, oval, red, cor-puscles. THE BLOOD. 101 man. It is comparatively easy to tell these corpusclesfrom the circular ours, as a glance at Figs. 23 and 27 willshow. Advantage is often taken of these facts, when greatcrimes have been com- O i mitted, in order to de-termine whether a bloodstain was caused by hu-man blood or by theblood of one of the loweranimals. Thus a knowl-edge of histology and theuse of the microscopeoften aids in detectingcrime and bringing theguilty to punishment. Fig. 28 illustrateswhat has been red corpuscles fromthirteen different ani-mals are illustrated,showing their relativesizes. Six are from themammalia, showing adifference in size butnot in shape ; they aretherefore easily toldfrom the others whichare oval. The first sixhave no nuclei, whilethe nucleus showsprominently in each o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiology, bookyear1
