Figure 10. The myoarterial formation and cerebral vascular system.

(A) Frontal histological section of the myoarterial formation located between the bilateral retina and above the visual neuropils. The section’s position is sketched in the bottom left corner. Scale bar = 100 µm. (B,C) 3D reconstruction of the myoarterial formation (orange), part of the cerebral vascular system (blue and cyan) and the brain (yellowish), from lateral (B) and anterolateral (C) views, in the cephalothorax. (B’ and C’) show higher magnifications of the cerebral vascular system. Dotted arrows indicate structures inside the brain. Open white arrows point towards anterior of the body axis. Abbreviations: see text and appendix 1.