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Such is precisely the appearance which the oesophagus would present to you, as the food passes down it, if you had the opportunity of seeing it in action; and this has been called the vermicular movement, in consequence of its resemblance to the movement of a worm.
You will perhaps inquire how the chyme continues to make its way through all these manifold twists of the intestines; but do not trouble yourself; it has only to let itself go. That vermicular movement which we noticed in the oesophagus and in the stomach is found here also.
In this latter case, whilst the tendril was slowly and quite insensibly crawling onwards, I observed several times through a lens that the whole surface was not in close contact with the stick; and I can understand the onward progress only by supposing that the movement is slightly undulatory or vermicular, and that the tip alternately straightens itself a little and then again curls inwards.
She is a woman of the most abject and cringing manner imaginable; a female counterpart of Uriah Heep, with an unknown multiplication of that vermicular gentleman’s writhings; she wore no hoops, she would have squirmed herself out of them in an instant; her dress was fastened securely on with numerous visible hooks and eyes, and pins, and strings, in spite of which precautions her visitor expected to see her worm out of it before she got up stairs, and would scarcely have been astonished to see her jerk her skeleton out of her skin, and complete her errand in her bones.
Such is precisely the appearance which the oesophagus would present to you as the food passes down it, if you had the opportunity of seeing it in action; and this has been called the vermicular movement, in consequence of its resemblance to the movement of a worm."
When our natural aliment arrives into the stomach, this organ is simulated into its proper vermicular action; which beginning at the upper orifice of it, and terminating at the lower one, gradually mixes together and pushes forwards the digesting materials into the intestine beneath it.
Mush-on! you Siwashes!" he cried, attempting, in a vermicular way, to kick at them, and discovering himself to be tottering on the edge of a declivity. As soon as the animals had scattered, he devoted himself to the significance of that declivity which he felt to be there but could not see. Nor was he long in arriving at a correct conclusion. In the nature of things, he figured, man is lazy.
A certain quantity of stimulus, less than that above mentioned, inverts the order of successive fibrous contractions; as in vomiting the vermicular motions of the stomach and duodenum are inverted, and their contents ejected, which is probably owing to the exhaustion of the spirit of animation in the acting muscles by a previous excessive stimulus, as by the root of ipecacuanha, and the consequent defect of sensorial power.
He had also propounded the theory that "the development of the human body might possibly be traced from the radiated vermicular molluscous and vertebrate organisms," thirty years before Darwin published The Origin of Species.
The stomach and intestinal canal have a constant vermicular motion, which carries forwards their contents, after the lacteals have drank up the chyle from them; and which is excited into action by the stimulus of the aliment we swallow, but which becomes occasionally inverted or retrograde, as in vomiting, and in the iliac passion.
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