Science 445: Cell Structure and Transport | 科学 445：细胞结构与物质运输

📚 Science 445: Cell Structure and Transport | 科学 445：细胞结构与物质运输

This revision article supports Edexcel IGCSE Science (Double Award) students by reviewing the essential ideas about cells and the movement of substances across membranes.

这篇复习文章面向 Edexcel IGCSE 科学（双奖）学生，帮你回顾关于细胞以及物质跨膜运动的核心知识。

1. Living Things Are Made of Cells | 生物由细胞构成

All living organisms are made of cells. Cells are the smallest structural and functional units of life. In an Edexcel IGCSE Science exam, you may be asked to identify cell structures or compare different types of cells.

所有生物体都由细胞构成。细胞是生命的最小结构和功能单位。在 Edexcel IGCSE 科学考试中，你可能会被要求辨认细胞结构或比较不同类型的细胞。

There are two main groups of organisms relevant to this course: eukaryotes and prokaryotes. Plants and animals are eukaryotic, meaning their cells contain a nucleus and membrane-bound organelles. Bacteria are prokaryotic and do not have a true nucleus.

本课程涉及两大类生物：真核生物和原核生物。植物和动物属于真核生物，它们的细胞含有细胞核和膜包被的细胞器。细菌属于原核生物，没有真正的细胞核。

2. Animal and Plant Cells | 动物

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