Manual of PhysiologyBlanchard and Lea, 1853 - 568 páginas |
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absorption action albumen animals appears arteries auricles bile blood vessels body brain branches canal capillaries carbonic acid cavity cells cerebellum cerebral changes chyle coagulation color columns connected contain contraction corpora quadrigemina corpuscles diameter digestion dilatation discharged disease ducts elastic embryo epithelium excited experiments external fibrine filaments functions ganglia ganglion gastric fluid glands glottis heart impressions influence intestine irritation lacteals larynx layer lungs lymph lymphatics medulla oblongata mind minute mode motor movements mucous membrane muscles nerve-fibres nervous centres nervous system nuclei nutrition observed optic organs orifice ovum oxygen papillæ particles pass peculiar Physiology pneumogastric pneumogastric nerves portion posterior probably produced quantity respiration respiratory retina secretion sensation sense skin sound spinal cord spinal nerves stomach structure substance supplied surface sympathetic temperature tion tissue trunk tube urine uterus valves vascular veins venous ventricle vesicle vibrations visceral arch walls yelk
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Página 228 - In order that the process of nutrition may be perfectly accomplished certain conditions are necessary. Of these, the most important are : 1. A right state and composition of the blood, from which the materials for nutrition are derived. 2. A regular and not far distant supply of such blood. 3. A certain influence of the nervous system. 4. A natural state of the part to be nourished.
Página 114 - ... itself. The course of the blood from the right side of the heart, through the lungs to the left, is shorter than most of the arches described by the systemic...
Página 404 - ... is, that the mucous membrane of the nasal cavity be moist. When the Schneiderian membrane is dry, the sense of smell is impaired or lost; in the first stage of catarrh, when the secretion of mucus within the^ nostrils is lessened, the faculty of perceiving odor is either lost or rendered very imperfect.
Página 75 - The Sounds of the Heart. When the ear is placed over the region of the heart, two sounds may be heard at every beat of the heart, which follow in quick succession, and are succeeded by a pause or period of silence. The first sound is dull and prolonged; its commencement coincides with the impulse of the heart against the chest wall, and just precedes the pulse at the wrist.
Página 293 - When in the restoration of a nose, a flap of skin is turned down from the forehead and made to unite with the stump of the nose, the new nose thus formed has, as long as the isthmus of skin by which it maintains its original connections...
Página 222 - Nutrition, on the other hand, is the process by which the various parts are maintained in the same general conditions of form, size, and composition, which they have already by development and growth attained.
Página 124 - But, even after the most violent expiratory efl'ort, the lungs are not completely emptied; a certain quantity always remains in them, over which there is no voluntary control, and which may be called residual air.
Página 297 - ... impressions made by external stimuli on sensitive nerves give rise to motions, these are never the result of the direct reaction of the sensitive and motor fibres of the nerves on each other ; in all such cases the impression is conveyed by the sensitive fibres to a nervous centre, and is therein communicated to the motor fibres.
Página 223 - It may be regarded as an established fact in physiology, that every particle of the body is formed for a certain period of existence in the ordinary conditions of active life, at the end of which period, if not previously destroyed by excessive exercise, it is absorbed or dies, and is cast off.
Página 399 - ... modifications in the state of the nerves produced by external influences as properties of the external bodies themselves. This mode of regarding sensations has become so habitual in the case of the senses which are more rarely affected by internal causes, that it is only on reflection that we perceive it to be erroneous. In the case of the sense of feeling or touch, on the contrary, where the peculiar sensations of the nerves perceived by the sensorium are excited as frequently by internal as...