Hemolymph
Hemolymph is the fluid used in some arthropod circulatory systems, including insects, to fills the interior hemocoel. Hemolymph is composed of water, inorganic salts, and organic compounds. Some of the organic compounds are free amino acids, and the content will vary by species in terms of which amino acids are present and their overall concentrations. The amino acids present in B. giganteus are alanine, arginine, cysteine, glutamic acid, glycine, histidine, leucine, proline, threonine, tyrosine, and valine. The amino acids present in greatest proportions were glutamic acid, alanine, glycine, and histidine. The overall concentration of amino acids is roughly 265 mg/100 ml of hemolymph. The presence of alanine, cysteine, glutamic acid, leucine, proline, tyrosine and valine is shared among different species of cockroaches, such as Blattella germanica and Periplaneta americana. The presence of arginine, however, is species-specific to B. giganteus.
Read more about this topic: Blaberus Giganteus