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Updated: May 22, 2025
One by one the many-coloured lights of the bottom winked off, the long feelers and contractile stems were drawn in, and the whole bottom became once more a motionless, dead-grey world.... Little sacks without eyes in that grey light, the gorging not begun, kept alive by the whip of fear.
From the depression, two long and delicate cilia proceed, one shorter than the other, and directed forwards. Close to the origin of these cilia, in the substance of the body, is a regularly pulsating, contractile vacuole. The shorter cilium vibrates actively, and effects the locomotion of the organism, while the other trails behind; the whole body rolling on its axis with its pointed end forwards.
In their more advanced mesoderm we find a few contractile longitudinal canals which force the blood through the body by their contractions; these are the first blood-vessels. Transverse section of the branchial gut. A of Balanoglossus, B of Ascidia. r branchial gut, n pharyngeal groove, asterisk ventral folds between the two.
I. When the contractile sides of the heart and arteries perform a greater number of pulsations in a given time, and move through a greater area at each pulsation, whether these motions are occasioned by the stimulus of the acrimony or quantity of the blood, or by their association with other irritative motions, or by the increased irritability of the arterial system, that is, by an increased quantity of sensorial power, one kind of fever is produced; which may be called Synocha irritativa, or Febris irritativa pulsu forti, or irritative fever with strong pulse.
His particular difficulty was the elastic lining of the contractile balloon. He found he needed a new substance, and in the discovery and manufacture of that new substance he had, as he never failed to impress upon the interviewers, "performed a far more arduous work than even in the actual achievement of my seemingly greater discovery."
The rationale of the strength of specula cast in this metal mould system, as compared with the treacherous brittleness of those cast in sand moulds, arises simply from the consolidation of the molten metal pool taking place first at the lower surface, next the metal base of the mould the yet fluid alloy above satisfying the contractile requirements of that immediately beneath it; and so on in succession, until the last to consolidate is the top or upper stratum.
But in those muscular fibres, which are subject to constant stimulus, as the arteries, glands, and capillary vessels, another phenomenon occurs, if their accustomed stimulus be withdrawn; which is, that the sensorial power becomes accumulated in the contractile fibres, owing to the want of its being perpetually expended, or carried away, by their usual unremitted contractions.
He devised an arrangement of contractile and absolutely closed balloons which when expanded could lift the actual flying apparatus with ease, and when retracted by the complicated "musculature" he wove about them, were withdrawn almost completely into the frame; and he built the large framework which these balloons sustained, of hollow, rigid tubes, the air in which, by an ingenious contrivance, was automatically pumped out as the apparatus fell, and which then remained exhausted so long as the aeronaut desired.
This membrane lines the structures that enclose the articulation and secretes a fluid, the synovia, that lubricates the surfaces. The muscles are the contractile organs that move the body. The movement of the different parts of the body is rendered possible through the manner in which the skeletal muscles are inserted into the long bones, by which the lever motion is possible.
Dallinger and Drysdale of the existence of a contractile vacuole in this monad, though they describe it in another. Their Heteromita, however, multiplied rapidly by fission.
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