The laws and mechanics of circulation, with the principle involved in animal movement . Fig. 189.—Six Cuts of the Leech, showing as many changes of form, assumed within afew minutes, allowing for the time occupied in filling itself with blood, and neces-sarily involving simultaneous expansion and contraction in the circular and longi-tudinal muscles. A, before feeding ; B, when extending itself ; C, when feeding ;D, when gorged with blood ; JE7, when freeing his feet for locomotion, drivingthe blood to the central portions ; F, when locomoting. but acting harmoniously and in utmost concert, th
The laws and mechanics of circulation, with the principle involved in animal movement . Fig. 189.—Six Cuts of the Leech, showing as many changes of form, assumed within afew minutes, allowing for the time occupied in filling itself with blood, and neces-sarily involving simultaneous expansion and contraction in the circular and longi-tudinal muscles. A, before feeding ; B, when extending itself ; C, when feeding ;D, when gorged with blood ; JE7, when freeing his feet for locomotion, drivingthe blood to the central portions ; F, when locomoting. but acting harmoniously and in utmost concert, their jointaction being essential for effecting the movements. Kow,then, and taking the state of rest as more nearly representingthe condition of equilibration where motion is reduced to aminimum, we have presented to us the following appearance(Fig. 189, A), in which the animal is very small, nearly round DUALISM DEMONSTRATED. 457 or ovoidal in form. But when locomotion sets in, all thisis changed (B), and from a short, globular body he assumes along rod-like shape, extending himse
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Keywords: ., bookcentury1800, bookde, booksubjectblood, booksubjectrespiration
