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Updated: May 4, 2025


What are the gill arches? 2. What the gill blades? 3. What is the bladder in fishes? 4. What is the cloaca in the egg-laying animals? 5. What signify the many fins of fishes? 6. What is the sac which surrounds the eggs in Bombinator obstetricans? . . .Tell Dr. I suppose you continue to come together now and then in the evening . . .Make me a sharer in your new discoveries.

'I am afraid you are mistaken, said Rollo, gravely. 'The manner and accent of the girl made me apprehend danger of some annoyance which I think she went to prevent. The road being a cul de sac, she knew, and they knew, we must come back that way. Gyda will find out all about it; but she said it meant mischief. 'Mischief? To us? 'Yes.

At first the egg seems nothing but a tiny round globule of jelly, but soon a dent or depression appears on one side, which becomes deeper and deeper until it extends to the centre of the egg-mass. It is as if we should take a round ball of putty and gradually press our finger into it. This pressed-in sac is a kind of primitive stomach and the entrance is used as a mouth.

A little higher up, in fresh-water polyp, the internal sac which digests and the outer skin which serves to envelop it can, if absolutely necessary, change their functions; if you turn the animal inside out like a glove it continues to live; its skin, become internal, fulfills the office of a stomach; its stomach, become external, fulfills the office of an envelope.

So he settled on using his 'voice of authority': "Hey, Lovebirds!" The Lovebirds jumped slightly and turned toward the voice, as if unaware that anyone else had been in the room. "Any idea where Seltsam Street or Avenue or whatever it is might be?" "Seltsam? Sounds German," Alona said. "Seltsam Way?" Tom asked. "Could be," Ritchie said. "That's that cul de sac that ends up behind the theater."

In a sheltered little cul de sac, between two white-thorn hedges, they took their seats; and Gillespie having pulled out his bottle and glass, began to ply the luckless young man with the strong liquor. And an easy task he found it; for Fenton resembled thousands, who, when the bounds of moderation are once passed, know not when to restrain themselves.

One of these, running from one surface of the cake, is a rope-like appendage, the umbilical cord, which links the placenta with the fetus. The other, attached to the circular edge of the cake, is a thin veil of tissue, in some part of which a rent will be found. Now, if we lift the margin of the rent, we shall see that the veil and the cake together form a sac which we are holding by the opening.

So long as the skin of the bean contains any edible matter, so long do new consumers establish themselves within it, so that the haricot finally becomes a mere shell stuffed with excreta. The skin, despised by the grubs, is a mere sac, pierced with holes as many as the inhabitants that have deserted it; the ruin is complete.

Here the sac, which is situated at the base of the heart, and is the part analogous to the auricle in man, plainly forces the blood into the heart, and the heart, in its turn, conspicuously transmits it by a pipe or artery, or vessel analogous to an artery; these are facts which are confirmed by simple ocular inspection, as well as by a division of the vessel, when the blood is seen to be projected by each pulsation of the heart.

"The recent hostilities, commenced by the Sac and Fox Indians, may be traced to causes, which have been for some time in operation, and which left little doubt upon the minds of those acquainted with the savage character, that they were determined to commit some aggression upon the frontier.

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