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Updated: June 16, 2025
The lining of the mouth and pharynx can be protruded as a proboscis, and drawn back by powerful muscles, and is armed with two or more horny claws. Eyes and claws gave them a great advantage over their not quite blind but really visionless and comparatively defenceless neighbors, and they must have wrought terrible extinction of lower and older forms.
Among the more interesting ones are small clefts or slits formed in the side walls of the rudimentary throat or pharynx. Blood-vessels go forward from the simple heart to run up through the intervening bars exactly as in the tadpole and the fish.
The tongue must be pulled well forward, the head held up, and the tongue released as soon as the ball is placed on the tongue, so that it may pass back into the pharynx. Drugs administered in this way act promptly and energetically. The alkaloid or active principle of the drug is commonly used.
A and B give no evidence of sugar, while C reduces the Fehling, giving a yellow or red deposit of cuprous oxide. Therefore, starch is converted into a reducing sugar by the saliva. This is done by the ferment ptyalin contained in saliva. The Pharynx and OEsophagus. The dilated upper part of the alimentary canal is called the pharynx. It forms a blind sac above the level of the mouth.
Each nostril opens into a short and rather narrow, but high, passage, known as the nasal passage, through which the air pours into the back of the throat, or pharynx, and so down into the windpipe and lungs. Instead of having smooth walls, however, the passage is divided into three almost separate tubes, by little shelves of bone that stick out from the outer wall.
The act of restoring a limb, etc., to its natural position after it has been flexed or bent; the opposite of flexion. Fauces. The part of the mouth which opens into the pharynx. Literally, "a window." Fenestra ovalis and fenestra rotunda, the oval and the round window; two apertures in the bone between the tympanic cavity and the labyrinth of the ear. Ferment.
M. Verriest auscultated with care the lungs, heart, and great vessels, and found the bruit de souffle, which he had detected in the morning at the apex of the heart and over the carotids. The handle of a spoon pressed against the velum, the base of the tongue, and the pharynx, provoked no effort at vomiting.
The vertebræ may become involved by infection taking place through the pharynx or œsophagus, and leading to a condition simulating tuberculous disease of the spine. When it implicates the intestinal canal and its accessory glands, the lungs, pleura, and bronchial tubes, or the brain, the disease is not amenable to surgical treatment. Differential Diagnosis.
It captured and imprisoned the sounds as the photograph retained the images of light. The colours of Nature were lost in the photograph, but the phonograph was said to preserve the qualities even of the human voice. Yet this wonderful appliance had neither tongue nor teeth, larynx nor pharynx. It appeared as simple as a coffee-mill.
The commoner pyogenic diseases are the result of infection of one or other of the joint structures with staphylococci or streptococci, which may be demonstrated in the exudate in the joint and in the substance of the synovial membrane. The mode of infection is the same as in the pyogenic diseases of bone, the metastasis occurring most frequently from the mucous membrane of the pharynx (J.
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