Corpus: Sphenoidal conchae

The conchae sphenoidales are two thin, curved bony lamellae on the anterior surface of the body of the sphenoid bone.

The shape of the conchae sphenoidales is irregular. The anterior wall of the conchae has variable openings through which the sphenoid sinus opens into the nasal cavity. Their superior surface is concave and points towards the sinus. The corresponding inferior surface is convex and forms part of the nasal roof.

Towards the front, the conchae sphenoidales articulate with the ethmoid bone (Os ethmoidale), laterally with the Os palatinum. The usually sharply tapering posterior tip protrudes between the rostrum and the pterygoid process of the sphenoid bone.