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acid action acts animals appears arch artery articulated attached base become birds blood body bones called carbon cartilage cavity centrum character close common consists constitute contains continually cords corresponding developed direction distinct effect elements equal example exists expanded extends extremity fishes fluid force forwards four functions give hæmal head heart human individual kind kingdom knowledge larynx length less ligaments living lower lungs matter means membrane motion mouth muscles muscular nature neural observed opening organs origin pass plants plates portion posterior present produced proper proportion remarkable rest ribs segment short side skeleton skull solid sound species spine structure substance supply surface teeth termed tissue tongue tribes true trunk tube upper vegetable veins vertebræ vessels vibrations vocal voice whole windpipe
Seite 200 - It is true that the serpent has no limbs, yet it can outclimb the monkey, outswim the fish, outleap the jerboa, and, suddenly loosing the close coils of its crouching spiral, it can spring into the air and seize the bird upon the wing: all these creatures have been observed to fall its prey.
Seite 303 - ... as is also that tooth in the lower jaw which, in opposing it, passes in front of its crown when the mouth is closed. The other teeth of the first set are the ' deciduous molars ; ' the teeth which displace and succeed them vertically are the ' premolars ; ' the more posterior teeth, which are not displaced by vertical successors, are the ' molars,
Seite 34 - ... truth of a proposition postulated, by showing that the deductions from it are true, requires that the truth of the deductions shall be shown in some way that does not directly or indirectly assume the truth of the proposition postulated. If, setting out with the axioms of Euclid, we deduce the truths that " the angle in a semicircle is a right angle...
Seite 312 - Beyond these two islands lies the sea of Andaman ; the people on this coast eat human flesh quite raw; their complexion is black, their hair frizzled, their countenance and eyes frightful, their feet are very large, and almost a cubit in length, and they go quite naked.
Seite 266 - ... 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 animals...
Seite 200 - ... fall its prey. The serpent has neither hands nor talons, yet it can outwrestle the athlete, and crush the tiger in the embrace of its ponderous overlapping folds.
Seite 319 - Besides these cars they have a superior kind of vehicle upon two wheels, covered likewise with black felt, and so effectually as to protect those within it from wet, during a whole day of rain.
Seite 188 - ... to the bottom ; if the right pectoral fin only be cut off, the fish leans to that side ; if the ventral fin on...