Branchial vascularization in the eel: action of acetylcholine and adrenaline on the distribution of polymerizable resin in the different vascular compartments.

The current findings from gill vascular cast preparations in the eel emphasize the division in each primary lamella of the afferent vasculature into two efferent pathways: an arterial pathway (via the secondary lamellae and the efferent branchial artery to the dorsal aorta), a venous pathway (via the central lamellar compartment and the branchial vein to the sinus venosus). By the same technique two antagonist mechanisms have been shown …