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according acid action affected animal anterior appear arrangement artery attached base becomes blood body bone branches branchial canal cause cavity cells character close common complete condition connected consists contained continued described developed direction disease distinct examined exist external extremity fact fibres four frequently gives gland head inches increase individual inferior instances internal lateral layer length less lower lungs mass matter membrane molar movements muscles muscular natural nearly nerves observed occur organs orifice origin passes period placenta portion position posterior present produced regard relation remarkable result ribs seen sense separated side similar single situated sometimes species structure substance surface teeth terminate testicle thorax tion tissue tongue tooth transverse true tube upper urethra urine usually varies vein vertical vessels weight whilst whole
Page 1149 - They, too, vary in ”size from that of a pin's head to that of a pea, and project but little over the surface of the membrane, and are therefore sometimes scarcely visible.
Page 1297 - It was found that the greyhounds could not support the fatigues of a long chase in this attenuated atmosphere, and before they could come up with their prey, they lay down gasping for breath; but these same animals have produced whelps which have grown up, and are not in the least degree incommoded by the want of density in the air, but run down • M. Roulin, Ann. des Sci. Nat., torn. xvi. p.16. 1829. the hares with as much ease as the fleetest of their race in this country.
Page 860 - ... in others as aids in locomotion, means of anchorage, instruments for uprooting or cutting down trees, or for transport and working of building materials ; they are characteristic of age and sex ; and in man they have secondary relations subservient to beauty and to speech. Teeth are always intimately related to the food and habits of the animal, and are therefore highly interesting to the physiologist : they form for the same reason important guides to the naturalist in the classification of...
Page 1297 - ... inches. It was found that the greyhounds could not support the fatigues of a long chase in this attenuated atmosphere, and before they could come up with their prey, they lay down gasping for breath ; but these same animals have produced whelps which have grown up, and are not in the least degree incommoded by the want of density in the air, but run down the hares with as much ease as the fleetest of their race in this country.
Page 881 - A true idea of the structure of a poison-fang will be formed by supposing the crown of a simple tooth, as that of a boa, to be pressed flat, and its edges to be then bent towards each other, and soldered together so as to form a hollow cylinder, or rather cone, open at both ends.
Page 889 - In the gavials, (genus gavialis,) the teeth are nearly equal in size, and similar in form, in both jaws, and the first, as well as the fourth tooth in the lower jaw, passes into a groove in the margin of the upper jaw when the mouth is closed.
Page 1297 - Some of our countrymen, engaged of late in conducting the principal mining association in Mexico, carried out with them some English greyhounds of the best breed, to hunt the hares which abound in that country. The great platform which is the scene of sport is at an elevation of about...
Page 854 - ... galvanism acts similarly. If the surface of the tongue, near the root, be touched with a clean dry glass rod, or a drop of distilled water be placed upon it, a slightly bitterish sensation is produced; and if the pressure be continued, a feeling of nausea ensues. If a small current of cold air be directed against the tongue, it excites a cool saline taste like that of saltpetre.
Page 978 - To the use of the sexual organs for the continuance of his race MAN is prompted by a powerful instinctive desire, which he shares with the lower animals. This instinct, like the...
Page 977 - ... tissue which afterwards exists so abundantly in this part; .the middle attachment of the gubernaculum, which may be traced to the dartos at the bottom of the scrotum, gradually wastes away and soon becomes indistinct, though slight traces of this process often remain to the latest period of life. Thus, after death, in dragging the testicle of an adult out of the scrotum by pulling the cord, the lower part of the gland, which is uncovered by serous membrane, is often found connected to the bottom...