Cookies帮助我们提供我们的服务。如果要使用我们的服务,您需同意我们使用cookie。
商品标签为：'Birds - Anatomy of Avian Skeletal System'
Birds - Anatomy of Avian Skeletal System
电话报价
The Skeletal System of birds includes various hollow bones with crisscrossing reinforcements for structural strength. Birds lack teeth and have a beak which is more lightweight. Birds have a fused collarbone, attached to the site of the muscles used for flight.