It contracts, and thus shuts up the fæces which the rectum cannot make an effort to dislodge; and in this circumstance the physiologist sees evidence of the sources whence the different parts derive their contractility. [Please select]
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Some authorities have thought their animality proved by the high degree of contractility which their tissues evince. [Please select]
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This, however, cannot go for much, as all physiologists admit contractility to belong to the vegetable tissues of the sensitive plant, "Venus' Fly-trap," &c. [Please select]
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Their bodies are composed of the substance, called _sarcode_, in which is imbedded a colouring matter resembling that in the leaves of plants; every part possesses irritability and contractility, and they are very sensitive to the stimulus of light. [Please select]
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As long as the individual cells remained together, they had undergone no changes of form, but after separating they show considerable contractility, and gradually alter their form, until they become undistinguishable from true _Amœbæ_ (Pl.) [Please select]
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