Structures, distribution and function in   Tissues of Plants  第二节 植物
   The plant body consists of integrated structures called organs, (器官）such as roots, stems, leaves, petals etc. which in turn are made of tissues. Concept: Tissues are cell complexes which are similar in origin and structure, and are of same functi
Tissues may be simple (consisting of one cell type only) as parachyma (薄壁细胞）, collenchyma （厚角组织）or sclerenchyma (厚壁细胞）, or complex (consisting of two or more cell types) as in the ca ...