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Physically we have, then, a heart with leaking or constricted valves; in either case more blood is entering the chambers of the heart than can be expelled in one contraction, while the peripheral resistance due to the spasm of the blood vessels, because of fear, becomes greater every minute and tends still more to interfere with the peripheral circulation and the complete emptying of the heart of its surplus blood.
He had heard all about it from his master, Fabricius, who made a great point of these valves in the veins, and he had heard the theories which Fabricius entertained upon the subject, whose impression as to the use of the valves was simply this that they tended to take off any excess of pressure of the blood in passing from the heart to the extremities; for Fabricius believed, with the rest of the world, that the blood in the veins flowed from the heart towards the extremities.
When the amins give permission the chains which restrain the mechanism are taken off, and the conduits are opened by means of iron handles operating on small valves of the same metal.
We opened the two valves, but even this outlet was insufficient, and we had to cut a hole about seven or eight inches long in the lower part of the balloon, through which the gas might escape.
After all, why need she be ashamed of what they were doing? "Tom and I are giving a course of lectures at the Mill, in hygiene, and we are just rehearsing a little; that's all. The valentine shows the heart action. Those arm things are the valves, you see." "But, really, you know, even a valve must have some perspective." "Well, of course, I'm no artist.
Two valves have been inserted into the door and before it is opened tubes with mercury are passed through which collect and store the emanation." "All very nice for the radium," remarked Craig cheerfully. "But the fellow had only to use an electric drill and the gram or more of radium was his." "I know that now," ruefully persisted Denison. "But the safe was designed for us specially.
I, Berlin, 1901. The views of Empedocles, and especially his doctrine that regarded the heart as the main site of the pneuma, though rejected by the Coan school as a whole, were not without influence on Ionia. This work describes the aorta and the pulmonary artery as well as the three valves at the root of each of the great vessels, and it speaks of experiments to test their validity.
The vast boilers, shaken by the titanic forces generating in their cavern-like depths, sent streams of scalding, hissing steam through a thousand valves, cylinders and pistons, turning wheels and cranks as it distributed the tremendous power which was driving the steel monster through the seas at the prodigious speed of four hundred miles in the twenty-four hours.
The mixture is drawn through the crank chamber, and to enter the cylinder it passes through the two automatic valves in the crown of the piston; the exhaust valves are situated in the tops of the cylinders, and are actuated by cams and push-rods. Cooling of the cylinder is assisted by the radial rings, and the diameter of these rings is increased round the hottest part of the cylinder.
But as these valves are placed in vessels, which are indued with life, and are themselves indued with life also; and are very irritable into those natural motions, which absorb, or propel the fluids they contain; it is possible, in some diseases, where these valves or vessels are stimulated into unnatural exertions, or are become paralytic, that during the diastole of the part of the vessel to which the valve is attached, the valve may not so completely close, as to prevent the relapse of the lymph or chyle.
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