Constituants osmotiquement actifs du sang et des muscles du scorpion Androctonus australis L.

The osmotic pressure of the hemolymph of the szcorpion Androctonus australis L., an Arthropod adapted to terrestrial life, is about -1°C. This osmotic pressure results almost entirely from the presence of Na+ and Cl-, a situation thus analogous to that found in Crustaceans, but different to that found in Insects, since, in the latter, amino acids are importically active intracellular constituants are mainly low molecular weight nitrogenous molecules, among which amino acids represent 1/5 of the osmolar concentration. As far as blood sugar is concerned, the scorpion's blood, like that of Insects, contains trehalose.