. An elementary course in practical zoölogy [microform]. Zoology; Zoologie. 94 PRACTICAL ZOOLOGY. apart the muscles, and find the sciatic nerve; with a sharp pair of scissors (while watching closely the foot; sever this nerve; what takes place ? 3. Hang up as before, and pinch the toes of each foot; what diiYerence is now observed? 4. With the forceps alternately pinch the two ends of the severed sciatir nerve; what takes place as these two ends are pinched? 5. Run a wire down the spinal column, twisting it about to destroy the spinal coid; what occurs while this is doing? C. Pinch the toes as
. An elementary course in practical zoölogy [microform]. Zoology; Zoologie. 94 PRACTICAL ZOOLOGY. apart the muscles, and find the sciatic nerve; with a sharp pair of scissors (while watching closely the foot; sever this nerve; what takes place ? 3. Hang up as before, and pinch the toes of each foot; what diiYerence is now observed? 4. With the forceps alternately pinch the two ends of the severed sciatir nerve; what takes place as these two ends are pinched? 5. Run a wire down the spinal column, twisting it about to destroy the spinal coid; what occurs while this is doing? C. Pinch the toes as before ; what results ? 7. Again pinch the end of the sciatic nerve, still con- nected with the parts below, being careful to pinch a little lower than before. THE frog's muscles. Make a circular cut through the skin at the top of the t'nighs, and pull off the skin of the hind limbs like a pair of hose. Notice the pale color of the muscles. The mus- cles of the frog's thigh are nearly the same in number and arrangement as in man. Notice especially the calf-muscle: the end by which it is attached above, the less movable end, is its origin. The muscle tapers into a strong, vhite tendon below. The end of the muscle at its morn movable end (or its attachment by a tendon at its more movable end) is its Insertion. Observe the thin, transparent membrane covering the muscle, the muscle-sheath. Tear the muscle to pieces. and note its fibrous structure. Put a bit of the muscle in a drop of water on a slide, uud ctjver with a cover-Siip:. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Colton, Buel P. (Buel Preston), 1852-1906. Halifax, N. S. : T. C. Allen; Boston : D. C. Heath
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
