（二）自由上肢骨The anterior review ofhumerus1、 Humerus 肱骨 : located in the upper armGreatertuberclehead of humerus大结节肱骨头Lesser tubercle小结节Surgical neck外科颈Intertubercularsulcus结节间沟Deltoid.tuberosity三角航粗隆Medial epicondyleRadial fossa内上桡窝capitulum ofhumerus骨小头6Trochleaof humerus肱骨滑车
（二）自由上肢骨 1、 Humerus 肱骨 ：located in the upper arm head of humerus 肱骨头 Lesser tubercle 小结节 Medial epicondyle 内上髁 capitulum of humerus 肱骨小头 Radial fossa 桡窝 Intertubercular sulcus 结节间沟 Deltoid tuberosity 三角肌粗隆 Surgical neck 外科颈 Trochlea of humerus 肱骨滑车 Greater tubercle 大结节 The anterior review of humerus 6
（二）自由上肢骨The posterior review of humerusheadofhumerus肱骨头Surgicalneck外科颈Sulcusforradialnerve神经沟Olecranon fossa鹰嘴窝Sulcus forulnarLateralnerve尺神经沟epicondle外上Trochlea of7humerus骨滑车
（二）自由上肢骨 head of humerus 肱骨头 Surgical neck 外科颈 Sulcus for radial nerve 桡神经沟 Lateral epicondle 外上髁 Olecranon fossa 鹰嘴窝 Sulcus for ulnar nerve尺神经沟 Trochlea of humerus 肱骨滑车 The posterior review of humerus 7
RadiusUpper end:head of radius 桡骨头,neck of radius 桡骨颈,radialtuberosity桡骨粗隆articularcircumference环状关节面Shaft： interosseous border 骨间缘Lower end:styloidprocess茎突ulnarnotch尺切迹carpal articular surface腕关节面8
Radius ◼ Upper end: head of radius 桡骨头, neck of radius 桡骨颈, radial tuberosity 桡骨粗隆, articular circumference 环状关节面 ◼ Shaft：interosseous border 骨间缘 ◼ Lower end: styloid process 茎突 ulnar notch 尺切迹 carpal articular surface 腕关节面 8