Relating to both the atrium and a pore; describing structures or passages connecting an atrial chamber with an opening.
From atrio- (Latin atrium) + poral (from Latin porus 'pore/opening') combined with -al suffix. A specialized zoological term used to describe fish anatomy.
Fish gills are connected to the body through 'atrioporal' passages in many species—understanding this anatomy helped biologists figure out how fish evolved from ancient swimming ancestors with simpler designs.
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