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It is perfectly true that, some time before, Harvey's master, Fabricius, had not only re-discovered, but had drawn much attention to certain pouch-like structures, which are called the valves of the veins, found in the muscular parts of the body, all of which are directed towards the heart, and consequently impede the flow of the blood in the opposite direction.
The moment it is freed, it attacks, with the rapidity of an arrow, the fish or turtle, on some part exposed from the shell, covering it with the pouch-like skin, and attaching itself with such tenacity that the only way to pull it off alive is by rolling a cord round a pole and raising the fish out of the water, when contact with the air causes it to drop its prey.
The passengers came trooping down the gangway, with an odd buoyancy of step caused by the steep incline, and Jack, for all his expectancy, had eyes, appreciative and critical, for the procession of his country-people. Stout, short men, embodying purely economic functions, with rudimentary features, slightly embossed, as it were, upon pouch-like faces.
In the pipe-fish family, too, the ardent evolutionist can trace a whole series of instructive and illustrative gradations in the development of this instinct and the corresponding pouch-like structure among the male fish.
The inner surfaces of many of the veins are supplied with pouch-like folds, or pockets, which act as valves to impede the backward flow of the blood, while they do not obstruct blood flowing forward toward the heart. The veins have no force-pump, like the arteries, to propel their contents towards their destination.
Spragg came in silently, setting his high hat down on the centre-table, and laying his overcoat across one of the gilt chairs. He was tallish, grey-bearded and somewhat stooping, with the slack figure of the sedentary man who would be stout if he were not dyspeptic; and his cautious grey eyes with pouch-like underlids had straight black brows like his daughter's.
This long and thin intestine then passes into the large intestine, from which it is cut off by a special valve. Immediately behind this "Bauhin-valve" the first part of the large intestine forms a wide, pouch-like structure, the caecum. The atrophied end of the caecum is the famous rudimentary organ, the vermiform appendix.
It is perfectly true that, some time before, Harvey's master, Fabricius, had not only re-discovered, but had drawn much attention to certain pouch-like structures, which are called the valves of the veins, found in the muscular parts of the body, all of which are directed towards the heart, and consequently impede the flow of the blood in the opposite direction.
"Thar's some walnut sticks amongst thet wood," she said as she replaced the hearth-broom, "an' they pops awful." From a pouch-like basket, made of skilfully interwoven hickory strips, and hanging against the wall, she took a half-finished stocking and a ball of yarn. Drawing a low rocking-chair up into the light, she seated herself and began knitting.
The discovery on a prisoner of a heavy leaden bullet about 3/4 inch in diameter led to an inquiry as to the object to which it was applied. It was ascertained that it served to aid in the formation of a pouch-like recess at the base of the epiglottis. The ball is allowed to slide down to the desired position, and it is retained there for about half an hour at a time.
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