ampullae of Lorenzini

Sharks, skates, electric rays, rays, lungfish, sawfish, sturgeon, and ratfish {chimaera} have skin pores that open into electrically charged gel tubes, which go to ampullae {ampullae of Lorenzini} (Stefano Lorenzini) [1678]. Ampullae have one sensor layer, with calcium ion inflow and potassium ion outflow, that sends to neurons that send along lateral-line nerve to brain.

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