Neurohaemal organs in the medial nervous system of insects.
D000818:Animals; D006458:Hemolymph; D007313:Insecta; D008853:Microscopy; D008854:Microscopy, Electron; D009420:Nervous System / Q000166:cytology* / Q000378:metabolism; D009489:Neurosecretion; D013194:Staining and Labeling