ScienceOrganisms & Life ProcessesAges 11–12

Cells to Organ Systems

Describe the hierarchical organisation of multicellular organisms: cells → tissues → organs → organ systems → organism

Lesson

Set out your lesson

Arrange levels of organisation and explain why an organ contains more than one tissue.

Before teaching

Activity

Can discuss the supplied example in an accessible mode; adapt directions without supplying the target answer.

Policy

Check the learner can follow the model with support before moving on. Source prerequisite ordering is not learner mastery; return to prerequisite work when needed.

Printer, credit, and teaching notes

Use the supplied labelled cards; no real tissues or microscope required. Open S first, G together, then T alone; put S and G away before T. Keys stay adult-only. No purchase or printing is required; an unavailable physical observation remains pending, not passed.

Materials are ready in each step. Use them on screen or print just the current step. Put teaching examples aside before the learner tries.

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Adult extras

What this lesson covers and its limits

These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

partial: Describe the hierarchical organisation of multicellular organisms: cells → tissues → organs → organ systems → organism
Two hierarchies offered; cellular specialisation across all body systems is not assessed.
partial: Places cells, tissues, organs, and organ systems in the correct order of organisation
Two hierarchies offered; cellular specialisation across all body systems is not assessed.
partial: Gives a specific example of each level (e.g. muscle cell → muscle tissue → heart → circulatory system → human)
Two hierarchies offered; cellular specialisation across all body systems is not assessed.
partial: Explains why specialised cells are needed in a multicellular organism
Two hierarchies offered; cellular specialisation across all body systems is not assessed.
partial: If {{name}} was asked to explain how the body is built up from the smallest parts to the whole, could they describe the levels from individual cells all the way up to organ systems — with a real example at each level?
Two hierarchies offered; cellular specialisation across all body systems is not assessed.

Two hierarchies offered; cellular specialisation across all body systems is not assessed.

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Arrange levels of organisation and explain why an organ contains more than one tissue.

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Learning resources

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BBC Bitesize · Practice link — not the full lesson

Living organisms

Open practice(new tab)

Before you open · source notes

Living organisms supports Cells to Organ Systems. An adult previews and guides; this is a learning page, not a scored quiz.

Free educational page, no sign-in required for the tested path.

Before you open

Ask the learner one fact they learned and one question they still have.

Opening this link does not save learning or assess mastery.

Source, access and review notes

Public BBC Bitesize page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

BBC Bitesize. “Living organisms.” External page; Gakuva does not copy, host, embed, or redistribute materials.

Unknown — link only

Check understanding

Places cells, tissues, organs, and organ systems in the correct order of organisation
Gives a specific example of each level (e.g. muscle cell → muscle tissue → heart → circulatory system → human)
Explains why specialised cells are needed in a multicellular organism

“If your child was asked to explain how the body is built up from the smallest parts to the whole, could they describe the levels from individual cells all the way up to organ systems — with a real example at each level?”

Curriculum record

Type: Conceptual
Subject: Science
Domain: Organisms & Life Processes
Age range: Ages 11–12

Standards

ngss-ms:MS-LS1-2uk-nc-2013:KS3.Sci.Bio.Cells.7