Extracellular space values and intracellular ionic concentrations in the isolated midgut of Philosamia cynthia and Bombyx mori.

Total extracellular space values have been determined in the midguts of 2 lepidopteran larvae, Philosamia cynthia and Bombyx mori. The values found are 42% and 45% tissue water respectively. Intracellular concentrations of Na+, Ca++ and Mg++ are very low, while K+ concentration is 197,2 mEq/l cell water Philosamia and 180.9 mEq/l cell water in Bombyx.