A Hundred Stomachs.
Some of the animalcules have in the interior of the body large cavities, which incessantly empty and fill themselves with colored fluid. These cavities represent the heart of large animals and their fluid the blood; and this circulating system is relatively so large that it may be stated, without exaggeration, that some microscopic beings have hearts fully fifty times as large and as strong, in proportion, as that of the horse or ox. A man has only one stomach, whilst invisible microzoa have sometimes a hundred.