The osteon is the functional unit of compact bone.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

7 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the osteon is the functional unit of compact bone?

Yes. Multiple reference and textbook sources confirm that the osteon serves as the fundamental structural and functional unit of compact (cortical) bone.

Verdict: SUPPORTED · 7 sources for, 0 against · Last checked 4 Oct 2026

How claims like this are judged

Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 7

Wikipedia: Osteon

Reference article covering this claim directly

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Wikipedia: Osteon. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Osteon

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More for · 6

PLOS (all journals): The last giants: New evidence for giant Late Triassic (Rhaetian) ichthyosaurs from the UK

Mentions compact bone showing secondary osteons.

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PLOS (all journals): The last giants: New evidence for giant Late Triassic (Rhaetian) ichthyosaurs from the UK. (n.d.). PLOS (all journals). https://doi.org/10.1371/journal.pone.0300289

Human Phenotype Ontology: Human Phenotype Ontology: compact bone tissue

Notes that compact bone consists of parallel osteons.

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Human Phenotype Ontology: Human Phenotype Ontology: compact bone tissue. (n.d.). Human Phenotype Ontology. http://purl.obolibrary.org/obo/UBERON_0001439

LibreTexts: LibreTexts: 7.02: Osseous Tissue (Bone Tissue)

States compact bone consists of microscopic functional units called an osteon.

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LibreTexts: LibreTexts: 7.02%3A Osseous Tissue (Bone Tissue). (n.d.). LibreTexts. https://bio.libretexts.org/Courses/West_Hills_College_-_Lemoore/Human_Anatomy_Laboratory_Manual_(Hartline)/07%3A_Introduction_to_the_Skeletal_System/7.02%3A_Osseous_Tissue_(Bone_Tissue)

National Library of Medicine MeSH: MeSH: Cortical Bone

Notes that cortical (compact) bone forms concentric lamellar osteons.

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National Library of Medicine MeSH: MeSH: Cortical Bone. (n.d.). National Library of Medicine MeSH. https://meshb.nlm.nih.gov/record/ui?ui=D000071538

OpenStax: OpenStax Biology for AP® Courses: 29.2 Bone

States that compact bone tissue consists of units called osteons or Haversian systems.

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OpenStax: OpenStax Biology for AP® Courses: 29.2 Bone. (n.d.). OpenStax. https://openstax.org/books/biology-ap-courses/pages/82dc3b49-7836-4dc0-b864-036056ca7ef4@

Semantic Scholar peS2o: Changes in the microstructure of compact and trabecular bone tissues of mice subchronically exposed to alcohol

Evaluates compact bone microstructures including primary and secondary osteons.

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Semantic Scholar peS2o: Changes in the microstructure of compact and trabecular bone tissues of mice subchronically exposed to alcohol. (n.d.). Semantic Scholar peS2o. https://jbiolres.biomedcentral.com/track/pdf/10.1186/s40709-018-0079-1

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