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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Cells, Tissues & Organs

Science · The Human Body · conceptual

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)

What mastery looks like

  • 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

Check your understanding

Can Cells, Tissues & Organs explain that the body is made of tiny cells, and that cells group together to make tissues, which make organs, which make whole systems?