Descriptive and Illustrated Catalogue of the Physiological Series of Comparative Anatomy Contained in the Museum of the Royal College of Surgeons in London ...

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Seite 46 - ... communication between the pulmonary and aortic chambers : these also, he remarks, intercommunicate by several round apertures of different sizes near the apex of the ventricle, which serve to thoroughly blend together the two kinds of blood before they are expelled thus mixed along the three arteries which separately arise from the ventricles. In this preparation the origins of the pulmonary artery and left aorta only are shown, and they are each provided with a pair of semilunar valves. The...
Seite 54 - The same great physiologist well observes, that in our examination of particular parts, the size of which is generally regulated by that of the whole animal, if we have only been accustomed to see them in those which are small or middle sized, we behold them with astonishment in animals so far exceeding the common bulk as the Whale. 'Thus...
Seite 15 - ... for attaching the head more effectually. The internal structure of the joints composing the body of this animal is partly vascular and partly cellular; the substance itself is white, and somewhat resembles in its texture the coagulated lymph of the human blood. The alimentary canal passes along each side of the animal, sending a cross canal over the bottom of each joint, which connects the two lateral canals together. Mr. Carlisle injected with a coloured size...
Seite 42 - This account of the venue cavro opening into the cavity of the pericardium may appear incredible; and it might be supposed that, in the natural state of the parts, there is a canal of communication going from one cava to the other, which being broken or nipt through in the act of catching or killing the animal, would give the appearance above described. I can only say that the appearances were what have been described in three different subjects which I have dissected, and in all of them the pericardium...
Seite 59 - The posterior tibial artery of a dog being laid bare, and its size attended to, it was observed to be so much contracted in a short time, as almost to prevent the blood from passing through it, and, when divided, the blood only oozed from the orifice.
Seite 54 - ... we behold them with astonishment in animals so far exceeding the common bulk as the Whale. Thus the heart and aorta of the Spermaceti Whale appeared prodigious, being too large to be contained in a wide tub, the aorta measuring a foot in diameter. When we...
Seite 54 - The aorta measured a foot diameter. Ten or fifteen gallons of blood are thrown out of the heart at a stroke with an immense velocity, through a tube of a foot diameter. The whole idea fills the mind with wonder...
Seite 69 - ... of that part. (Cat., vol. ii.) To this Professor Owen adds, that in the description of the Holothuria above quoted, Mr. Hunter attributes to these organs a more limited share in the great excretory functions than they undoubtedly perform, regarding them, from their connexion with the cloaca, as analogous to the kidneys of the higher animals. Distinct urinary organs are not however, observes the Professor, developed until we arrive at a much higher point in the scale of organization than the Holothuria...
Seite 46 - ... chamber is displayed by the removal of the posterior parietes of the ventricle. On the opposite side the pulmonary chamber is exposed ; and the Professor remarks in continuation, that it is of a larger size, of a more regular oval form, and with a smoother surface. The fleshy septum, extending from the base of the ventricle to the space between the roots of the pulmonary and systemic arteries, is incomplete at its upper and anterior part, and there leaves a communication between the pulmonary...
Seite 27 - ... situated at nearly the middle of the posterior surface of the pulmonary sac, and protected above by the rudimentary shell, so that this part of the structure in these animals is, as in other points, nearly allied. The preparation in the College Museum, No. 882 (Gallery), is a specimen of Helix Pomatia with the shell removed in order to show the heart, which is situated on the left side of the dorsal aspect of the body, near the posterior part of the branchial sac. The pericardium is laid open,...

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