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The Vertebrate Trait Ontology (VT) is being developed as a collaborative effort between the Rat Genome Database at the Medical College of Wisconsin (RGD,, Mouse Genome Informatics at the Jackson Laboratory ( and the Animal QTL database at Iowa State University ( For more information about this vocabulary, or to request additions or changes, please contact us (

Term:smooth muscle morphology trait
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Accession:VT:0000767 term browser browse the term
Definition:Any measurable or observable characteristic related to the shape, structure, color, or pattern of any of the unstriated, involuntary muscle tissue of the internal organs, blood vessels, and other body structures not under willful control.

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  vertebrate trait 5
    organ system trait 5
      muscular system trait 0
        muscular system morphology trait 0
          smooth muscle morphology trait 0
            blood vessel smooth muscle morphology trait + 0
            esophageal smooth muscle morphology trait 0
            intraocular muscle morphology trait 0
            tracheal smooth muscle morphology trait 0
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