Fig. 9 in Morpho-histological characterization of immature of the bioindicator midge Chironomus sancticaroli Strixino and Strixino (Diptera, Chironomidae)

Fig. 9. Micrographs of the circulatory system and the integument of immature Chironomus sancticaroli. (A) Longitudinal section of the heart, note the ostium region (arrows); (B) longitudinal section of the region of the vessel wall with the cell of the vessel (arrowhead); (C) longitudinal section showing the aortic valves (*); (D) pericardial cells attaching to the wall of the aorta; (E) longitudinal section of the integument of the head capsule, showing the epithelium and the large amount of exocuticle; (F) longitudinal section of the integument of the body of the larva, note the greater amount of endocuticle. alu: aortic lumen; ao: aorta, ed: endocuticle; ep: epidermis, e.g. exocuticle; h: hemolymph, ht: heart; re: rectum. Stain: Harris hematoxylin and eosin. Scale bar = 20 µm.