har Upper end olecranon鹰嘴 coronoid process冠突 trochlear notch滑车切 迹 Lower end sty loid process尺骨 茎突 head of ulna尺骨头Ulnar ◼ Upper end: olecranon鹰嘴 coronoid process 冠突 trochlear notch滑车切 迹 ◼ Lower end styloid process 尺骨 茎突 head of ulna 尺骨头