. The animals and man; an elementary textbook of zoology and human physiology. Zoology; Physiology. THE ANIMALS AND MAN Fig. 1. Locusts on wild oats. (Natural size; from life.) structure of a part and its function or business are close- ly related. A grasshopper's hind legs are specially long and strong so as to enable the grasshopper to hop; or we may put it differently and say that the grasshopper can hop because its hind legs are specially long and strong. In whichever way we look at this relation between the power of an animal to do something in a special way and its posses- sion of parts
. The animals and man; an elementary textbook of zoology and human physiology. Zoology; Physiology. THE ANIMALS AND MAN Fig. 1. Locusts on wild oats. (Natural size; from life.) structure of a part and its function or business are close- ly related. A grasshopper's hind legs are specially long and strong so as to enable the grasshopper to hop; or we may put it differently and say that the grasshopper can hop because its hind legs are specially long and strong. In whichever way we look at this relation between the power of an animal to do something in a special way and its posses- sion of parts specially fitted for doing this something, whether it be hopping, or flying, or singing, or breathing under water, it must be kept always plainly in mind that such a close^ relation does exist. Therefore when we study the make-up of an animal, examining care- fully the various parts of the body, we should always remember that this partic- ular make-up or structure is closely con- nected with the things the animal can do, and the special manner in which it does them. The grasshopper.—Grasshoppers, better called locusts, of some kind can be readily t^j^ found along roadsides or in fields (fig. i). Collect several specimens, keeping some alive and dropping the others into the killing-bottle (see p. 472). Examine care- fully a dead specimen. Note that the body. 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; McCracken, Mary Isabel. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookd, booksubjectphysiology, booksubjectzoology
