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In women, too, the sexual aims of the inverted are manifold, among which contact with the mucous membrane of the mouth seems to be preferred.
The necessity of the oxygenation of the blood in the fetus is farther illustrated by the analogy of the chick in the egg; which appears to have its blood oxygenated at the extremities of the vessels surrounding the yolk; which are spread on the air-bag at the broad end of the egg, and may absorb oxygene through that moist membrane from the air confined behind it; and which is shewn by experiments in the exhausted receiver to be changeable though the shell.
The bag of waters should rupture normally while it is being pushed through the external opening. Sometimes the bag does not rupture directly in front of the descending head but further up along the side. Then a portion of the membrane may be over the face of the child when it is born. This is what is called being "born with a veil" or "born with a caul."
In addition to mucous patches, there may be a number of small, superficial, kidney-shaped ulcers, especially along the margins of the tongue and on the tonsils. In the absence of mucous patches and ulcers, the sore throat may be characterised by a bluish tinge of the inflamed mucous membrane and a thin film of shed epithelium on the surface.
Not that he was at all happy indeed, he had no reason to be so; for, first, the hounds would not find; next, he had left half-finished at home a review article on the Silurian System, which he had solemnly promised an abject and beseeching editor to send to post that night; next, he was on the windward side of the cover, and dare not light a cigar; and lastly, his mucous membrane in general was not in the happiest condition, seeing that he had been dining the evening before with Mr.
Within the calcareous shell are two delicate membranes that enclose the white or albumen; within this, swung by two thickened cords of the albumen, is the yellow yolk ball enclosed by a proper membrane of its own.
Fragments of the parent tumour may become separated and be carried off in the lymph or blood-stream and deposited in other parts of the body, where they give rise to secondary growths. Malignant tumours tend to invade and destroy the overlying skin or mucous membrane, and thus give rise to bleeding ulcers; if the tumour tissue protrudes through the gap in the skin, it is said to fungate.
Their size and consistence are variable sometimes soft, tearing with the greatest facility, and bleeding at the slightest touch; at other times, solid and covered with pituitary membrane. They are generally the result of ulcerations, wounds, fractures, perforations of the turbinated bones, sinuses,&c.
If the child's lower lip be pulled down, little red spots will be seen scattered over the lining membrane of the mouth, showing that the eruption is not confined to the skin.
Traube has pointed out that the very delicate membrane of ferrocyanide of potassium which is obtained with some difficulty by exposing it to the reaction of sulphate of copper, is permeable to water, but will not permit the passage of the majority of salts.
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