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在济南版七年级生物学下册教材中有多处所提及到由单层上皮细胞构成的结构,它们是小肠绒毛壁、毛细淋巴管壁、具有外壁和内壁的肾小囊腔、肺泡壁、毛细血管壁、肾小球毛细血管壁、肾小管管壁。这类结构又分为两类,其中小肠绒毛、毛细淋巴管、具有外壁和内壁的肾小囊腔、肺泡壁构成的是盲管结构,毛细血管、肾小球毛细血管、肾小管都是两段通畅的管道结构。由于管壁都是由
There are many references to the structure of monolayer of epithelial cells in the textbooks of the seventh grade biology of Jinan, which are the small intestine villi wall, the lymphatic wall, the renal cyst cavity with the outer wall and the inner wall, the alveolar wall , Capillary wall, glomerular capillary wall, renal tubular wall. Such structures are divided into two categories, including small intestine villi, lymphatic vessels, with the outer wall and the inner wall of the renal cysts, the alveolar wall is composed of the structure of the blind tube, capillaries, glomerular capillaries, tubules are two Piping section of the pipeline structure. Because the walls are made of