细胞、组织与器官

理解身体是按层次结构组织的：微小的细胞是身体的基本构件，相似的细胞组成组织，组织组合成器官（如心脏或胃），器官再协同工作形成器官系统（如循环系统）。

Understand that the body is organised in a hierarchy: tiny cells are the building blocks, groups of similar cells form tissues, tissues combine into organs (like the heart or stomach), and organs work together in organ systems (like the circulatory system)

学习证据 / Evidence

• 能说出细胞是身体最小的基本构成单位，小到不借助显微镜就看不见。
• 能描述身体结构的层级：细胞→组织→器官→器官系统。
• 能举例说明：肌肉细胞形成肌肉组织，肌肉组织构成心脏这个器官，心脏是循环系统的一部分。

• State that cells are the smallest building blocks of the body, too small to see without a microscope
• Describe the hierarchy: cells → tissues → organs → organ systems
• Give an example: muscle cells form muscle tissue, which forms the heart organ, which is part of the circulatory system

评估问题 / Assessment

{{name}}能解释身体是由微小细胞组成的，细胞组合成组织，组织组成器官，器官再组成完整的系统吗？

Can {{name}} explain that the body is made of tiny cells, and that cells group together to make tissues, which make organs, which make whole systems?