豌豆骨连接尺骨和腕骨的小骨头。
在与现代鸟类亲缘关系较为接近的兽脚亚目恐龙身上存在一块特殊的楔形腕骨，正是这块腕骨的存在它们的前肢才能得以弯曲。
In the theropods that were closely related to living birds, a particular wristbone was wedge-shaped, allowing them to bend their hands.
舟骨相对头状骨的运动小于月骨，即舟骨跟随远侧列腕骨一起运动，但又不同于远侧列腕骨之间的微动，舟骨起着远近侧列腕骨的桥梁作用。
The scaphoid acting as the bridge between distal and proximal row of carpal bones follows the distal row of carpal bones, which differs from the slight movements of the distal row of carpal bones.
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