广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Structures of wool fibers 口 Submicrostructure ■ Cotex core of the wool fiber. 90% of the fiber volume consists of countless long spindle-shaped cells held together by intercellular cementStructures of wool fibers ❑ Submicrostructure ◼ Cotex ➢ core of the wool fiber: ➢ 90% of the fiber volume, ➢ consists of countless long, spindle-shaped cells held together by intercellular cement