Abstract

The manometric method of measuring rates of oxygen consumption by organisms is extensively applied in biology laboratories. The respirometer, shown in figure 1, though simple, incorporates most of the basic elements of elaborate and expensive respirometers, and can be built inexpensively by high school students. This respirometer was used to determine the oxygen consumption of a cecropia moth cocoon over a two-month period. A larger device of the same type was used to determine the rate of oxygen consumption in mice throughout pregnancy. Two units with exactly the same components must be built: one will be used as a respirometer; the other with no living material in it, will be

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