An elementary physiology and hygiene for use in upper grammar grades . for the disease simplymakes him weak and indolent; andhis friends perhaps think him lazy,when he is really an invalid. The disease is chiefly associated withand chiefly acquired from filthy hab-its. The eggs of the worms pass outof the body with the fasces and de-velop into little worms too small to beseen by the eye. These remain aliveon the ground and are likely to catchupon a persons bare feet. Here theyfirst cling to the skin and later boretheir way through into the blood vesselsand finally into the intestine. Mostcases
An elementary physiology and hygiene for use in upper grammar grades . for the disease simplymakes him weak and indolent; andhis friends perhaps think him lazy,when he is really an invalid. The disease is chiefly associated withand chiefly acquired from filthy hab-its. The eggs of the worms pass outof the body with the fasces and de-velop into little worms too small to beseen by the eye. These remain aliveon the ground and are likely to catchupon a persons bare feet. Here theyfirst cling to the skin and later boretheir way through into the blood vesselsand finally into the intestine. Mostcases of the disease are thus due tofilthy habits and bare feet, althoughthere are other means by which theworms may get into the intestine. Thedisease may be largety avoided by clean-liness and by wearing shoes. Cholera. — Cholera is a germ diseasethat has been common in some easterncountries, but hardly known in the United it was discovered that the germ is distributed bycontaminated drinking water, the disease has almostentirely disappeared from Eig. 83. — TheHook , natural size,ft, an adult worm, magnified,c, a young wormready to enterthe body throughthe skin. 264 PHYSIOLOGY AND HYGIENE
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
