human_reference_atlas part of Homo sapiens trochlea of humerus http://upload.wikimedia.org/wikipedia/commons/4/4b/Trochleahumeri.png The medial portion of the articular surface of the humerus is named the trochlea, and presents a deep depression between two well-marked borders; it is convex from before backward, concave from side to side, and occupies the anterior, lower, and posterior parts of the extremity. It is directly inferior to the most prominent anterior humeral fossia, the Coronoid fossia. It articulates with the ulna. uberon trochlea humeri UBERON:0000144 trochlea of humerus SCTID:282817004 trochlea of humerus Wikipedia:Trochlea_of_humerus AS FMA:23370 humeral trochlea humerus zone of bone organ