It consists of the clavicle and scapula in humans and, in those species with three bones in the pectoral girdle, the coracoid.

• 两栖动物没有锁骨。爬行动物的锁骨和肩胛骨往往只是软骨。而且在锁骨和胸骨之间还有一块间锁骨（）。