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液泡
线粒体
中心体 高尔基体
动物细胞
纤毛
细胞膜 细胞质 细胞核
粗面内质网 光面内质网
请观察光学显微镜下未经染色的动物细胞
请思考:
1.你怎样区分显微镜视野中 的气泡和细胞?
光学显微镜下能看见细胞 膜吗? 2.科学家用电子显微镜清晰地观察到细 胞膜之前,已经能够确定细胞膜的存 在了,请你推测科学家是怎样确定细 胞膜的存在的?
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