@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/biological_psychology>
  skos:prefLabel "biological psychology"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/diurnal_rhythm>
  skos:prefLabel "diurnal rhythm"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/circadian_rhythm>
  skos:exactMatch <https://id.nlm.nih.gov/mesh/D002940.html> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/health_sciences>, <https://concepts.sagepub.com/social-science/concept/periodicity>, <https://concepts.sagepub.com/social-science/concept/physiological_periodicity>, <https://concepts.sagepub.com/social-science/concept/physical_and_biological_development>, <https://concepts.sagepub.com/social-science/concept/biological_psychology> ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/diurnal_rhythm>, <https://concepts.sagepub.com/social-science/concept/activity_cycles> ;
  a skos:Concept ;
  skos:definition "Circadian rhythms refer to regular or rhythmic variations in biological and behavioral measures approximately (“circa”) on a 24-hour or daily (“dian”) timing basis. Virtually all biological and behavioral measures taken over time show circadian rhythms. [Source: <a href=\"https://sk.sagepub.com/reference/humandevelopment/n132.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of Human Development; Circadian Rhythm</a>]"@en ;
  skos:prefLabel "circadian rhythm"@en .

<https://concepts.sagepub.com/social-science/concept/physiological_periodicity>
  skos:prefLabel "physiological periodicity"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/activity_cycles>
  skos:prefLabel "activity cycles"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/physical_and_biological_development>
  skos:prefLabel "physical and biological development"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/periodicity>
  skos:prefLabel "periodicity"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .

<https://concepts.sagepub.com/social-science/concept/health_sciences>
  skos:prefLabel "health sciences"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/circadian_rhythm> .