The dense, semirigid, porous, calcified connective tissue forming the major portion of the skeleton of most vertebrates.It consists of a dense organic matrix and an inorganic, mineral component.

• 骨质，骨骼构成大多数脊椎动物骨架主要部分的稠密的、半刚性的、多孔的、钙化的连结组织。它一部分由有机质，一部分由无机矿物成分构成