鸟类肩带中特有的骨骼.由左右锁骨及退化的间锁骨在腹中线处愈合成“Ｖ”形.两侧的骨棒细长而稍曲，近端扁宽，接近乌喙骨突处以韧带与肩臼连接.两侧远端斜向内下方延伸，在接近胸骨中线处愈合成扁平的突起（见图）。叉骨叉骨坚实而富有弹性，在鸟翼剧烈搧动时可避免左右乌喙骨向中间靠近发生碰撞、挤压气管，并增加肩带弹性.无飞翔能力的鸵鸟等平胸总目鸟类，叉骨退化成为乌喙骨的一部分.相 关 词 条:始祖鸟 |GOOGLE英文翻译:Shoulder strap in the bones of birds unique. From the left clavicle and the degradation of the inter-clavicular line at the belly of healing into a "V" shape. On both sides of the bone and the slightly elongated rod song, proximal bian wide, near the Ukrainian beak bone suddenly imposed acetabular ligament and the shoulder connection. on both sides of the bottom of the remote inclined extension of the sternum near the midline healing into the flat and protruding (see figure). Wishbone wishbone firm and elastic, in the bird wing flap can be avoided sharp beak bones about Ukraine closer to the middle of a collision, squeeze the trachea, and increase flexibility in shoulder strap. Ostriches and other non-flying capacity of Head of birds Platysternon , forks and bone degradation, bone beak to become a part of Ukraine. Related term: archeopteryx |