. Advanced biology. Biology; Physiology; Reproduction. 496 DEFENSES AGAINST DISEASE The respiratory trad furnishes a means for the entrance of germs. Spray or droplets of sputum sneezed or coughed out may be breathed in by other people. Germs of pneumonia, diphtheria, scarlet fever, and colds often enter the bo(h' in this wav. Certain other organisms enter the body through Avounds or skin abrasions. These skin openings may be of various kinds. Cuts, scratches, torn hangnails, and cracked skin are responsible for the entrance of dirt which may carry not only tetanus germs but, when present, rin
. Advanced biology. Biology; Physiology; Reproduction. 496 DEFENSES AGAINST DISEASE The respiratory trad furnishes a means for the entrance of germs. Spray or droplets of sputum sneezed or coughed out may be breathed in by other people. Germs of pneumonia, diphtheria, scarlet fever, and colds often enter the bo(h' in this wav. Certain other organisms enter the body through Avounds or skin abrasions. These skin openings may be of various kinds. Cuts, scratches, torn hangnails, and cracked skin are responsible for the entrance of dirt which may carry not only tetanus germs but, when present, ringworm (a parasitic mold), hookworms, or other pathogenic organisms. Insect bites form openings through which germs may be introduced. The bite of an Aedes mosquito may transmit yellow fever; the Anopheles mosquito, malaria; the rat flea, bubonic plague; the body louse, typhus fever; and the tsetse fly, x\frican sleeping sickness. The bites of rabid dogs, cats, wolves, and other animals are responsible for hydrophobia. Some organisms enter the body through the eyes. If the eyes are rubbed with an infected hand or dried with an unclean towel, such diseases as trachoma and pink eye may possibly result. Safeguards of the body against disease. The best defense of the body is the strong natural resistance that accompanies good health. As long as rules of health are followed, the vitality is likely to be high. Even though bacteria then invade the body the natural. 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 Wheat, Frank Merrill; Fitzpatrick, Elizabeth T. New York ; Boston [etc. ] : American Book Company
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Keywords: ., bookcentury1900, bookdecade1920, booksubje, booksubjectphysiology
