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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Hyaline membranes
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Accession:HP:0033363 term browser browse the term
Definition:Hyaline membranes are homogeneous eosinophilic material composed of cellular debris, plasma proteins, and surfactant\nplastered against alveolar ducts and alveolar walls. The hyaline membranes are deposited along the walls of the alveoli, where gas exchange typically occurs, thereby making gas exchange difficult.

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the respiratory system 0
        Abnormal respiratory system morphology 0
          Abnormal lung morphology 0
            Abnormal pulmonary alveolar system morphology 0
              Hyaline membranes 0
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