@3、骨骼特点: 骨骼为轻而坚的气质骨,脊椎头骨多愈合,胸骨具龙骨突, 开放式骨盆。 conarD Figure 33-26 A pigeons skeleton shows several adaptations for flight. The large, keeled breast- bone serves as an attachment point for flight muscles.The collarbone helps absorb the Breastbone stresses of flight Reptiles and Birds 76 3、骨骼特点： 骨骼为轻而坚的气质骨，脊椎头骨多愈合，胸骨具龙骨突， 开放式骨盆