Science for beginners . in essentially thesame waj^ as animals do bnt they have no organ like astomach, or alimentary tract in which this process is carriedon. The molds secrete, produce and give out, certain fluidscalled digestive enzymes. These enzymes diffuse, or spreadout, into the material in which the mold is growing. These 266 MICROORGANISMS enzymes prepare the food materials for absorption and assim-ilation by the molds much as the gastric juice of our stomachsprepares the food materials in our stomachs for absorptionand assimilation by the walls of our stomachs. We, perhaps,might well
Science for beginners . in essentially thesame waj^ as animals do bnt they have no organ like astomach, or alimentary tract in which this process is carriedon. The molds secrete, produce and give out, certain fluidscalled digestive enzymes. These enzymes diffuse, or spreadout, into the material in which the mold is growing. These 266 MICROORGANISMS enzymes prepare the food materials for absorption and assim-ilation by the molds much as the gastric juice of our stomachsprepares the food materials in our stomachs for absorptionand assimilation by the walls of our stomachs. We, perhaps,might well say that the entire exterior, or outside, surface ofthe mold is its stomach. Thus, when we say that molds have caused an apple todecay, we might describe more fully what happens if we wereto say that the molds have digested and absorbed and grownon the foods contained in the apple. We can not say that themold eats the apple for, as we commonly use that term, itinvolves chewing and swallowing and this the mold does not.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscience, bookyear1921
