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Example Sentences for "constriction "


A modification of this pipette, in which a constriction or short length of capillary tube is introduced just below the plugged mouth (Fig.

A circular constriction of the organism takes[Pg 137] place midway between these aggregations, and a septum is formed in the interior of the cell at right angles to its length.

Replace the cotton-wool plug by an india-rubber stopper perforated with one hole and fitted with a length of glass tubing which has a constriction about 3 cm.

(If using a pipette with a constriction below the plugged mouthpiece (Fig 13b), this portion of the pipette may also be sealed in the flame.

These are slightly longer than the ordinary tubes, and are provided with a constriction some 2 cm.

The Torulacei represent the superficial fungi of this family, and these consist of a more or less developed mycelium, which gives rise to fertile threads, which, by constriction and division, mature into moniliform chains of spores.

Shorter fusiform sporidia are by no means uncommon, varying in the number of septa, and in constriction at the joints in different species.

The emission of sounds from the resonator may be modified by interruption or constriction in three situations, at each of which added vibrations may occur, (1) At the lips, the constriction being formed by the two lips, or by the upper or lower lip with the lower or upper dental arch.

(2) Between the tongue and the palate, the constriction being caused by the opposition of the tip of the tongue to the anterior portion of the hard palate or the posterior surface of the dental arch.

(3) At the fauces, the constriction being due to approximation of the root of the tongue and the soft palate.

The constriction before mentioned, which was always seen in certain positions, although it varied very considerably in depth and width, drew up the integument towards the main trunk of the digestive tube, and thus the animal had a[135] distinct ventral and dorsal side.

Presently a decided constriction appeared about half-way below the mouth and proboscis, and in transverse direction.

Others supposed many diseases to arise from a constriction of the extreme vessels by cold; or from a spasm of them, which was a contrivance of the vis medicatrix, to rouse the action of the heart and arteries to remove the debility induced.

The former has a constriction just above the bulb, which prevents the mercury from retreating after it has reached the highest reading for the day.

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