. First lessons in zoology. Zoology. P'lG. 67. Fig. 67.—Nervous system of the house-fly, the central nerve-cord and ganglia lie in the ventral (under) part of the body. (After Brandt.) Fii:. 68.—Nervous system of a midge {^Chiroiiomiis)-^ note the separation of all the ganglia. (After Brandt.) nervous system any more than we do of a muscular or bony system. In comparing the nervous systems of various animals as we have their muscular, bony, and circulatory systems wc find the same variety and progressive degree of development holding true. In Amceba the whole cell is in a weak way sensitive to


. First lessons in zoology. Zoology. P'lG. 67. Fig. 67.—Nervous system of the house-fly, the central nerve-cord and ganglia lie in the ventral (under) part of the body. (After Brandt.) Fii:. 68.—Nervous system of a midge {^Chiroiiomiis)-^ note the separation of all the ganglia. (After Brandt.) nervous system any more than we do of a muscular or bony system. In comparing the nervous systems of various animals as we have their muscular, bony, and circulatory systems wc find the same variety and progressive degree of development holding true. In Amceba the whole cell is in a weak way sensitive to light, heat, jars, odors, acids, alkalis, and the various other things that affect the sense- organs of higher animals. The cell as a whole conducts the effects of these to all its parts and the response of the animal is slow and 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York, H. Holt and Company


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903