The reticular formation consists of nerve fibers, and there are no nerve cells. 网状结构由神经纤维组成，没有神经细胞。

Which one has the function of defense and protection A: Matrix B: Collagen fibril C: Collagen fiber D: Elastic fiber E: Reticular fiber

Which of the following descriptions is NOT true of the basement membrane?( ) A: a member of the junctional complex B: located between epithelium and underlying connective tissue C: consists of the basal lamina and the reticular lamina D: positive staining with PAS E: observed with silver stain