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Statements

Subject Item
dbr:Discontinuous_gas_exchange
rdfs:label
Discontinuous gas exchange
rdfs:comment
Discontinuous gas-exchange cycles (DGC), also called discontinuous ventilation or discontinuous ventilatory cycles, follow one of several patterns of arthropod gas exchange that have been documented primarily in insects; they occur when the insect is at rest. During DGC, oxygen (O2) uptake and carbon dioxide (CO2) release from the whole insect follow a cyclical pattern characterized by periods of little to no release of CO2 to the external environment. Discontinuous gas exchange is traditionally defined in three phases, whose names reflect the behaviour of the spiracles: the closed phase, the flutter phase, and the open phase.
dcterms:subject
dbc:Insect_physiology dbc:Respiration
dbo:wikiPageID
19849232
dbo:wikiPageRevisionID
1052291401
dbo:wikiPageWikiLink
dbr:Population dbr:Amplitude dbr:Natural_selection dbr:Messor_(ant_genus) dbr:Coleoptera dbr:Air dbr:Arthropod dbr:Drosophila_melanogaster dbr:Simple_diffusion dbc:Insect_physiology dbr:Hypothesis dbr:Honeybee dbr:Hypoxia_(medical) dbr:Invertebrate_trachea dbr:Nervous_system dbr:Diffusion dbr:Respiratory_system dbr:Cell_(biology) dbr:Humidity dbr:Water dbr:Muscular_contraction dbr:Respiratory_system_of_insects dbr:Muscle_contraction dbr:Tracheoles dbr:Haemolymph dbr:Buffer_solution dbr:Partial_pressure dbr:Stimulus_(physiology) dbr:Evolution dbr:Terrestrial_animal dbr:Insect_flight dbr:Animal dbr:Gases dbc:Respiration dbr:Pressure dbr:Convergent_evolution dbr:Convection dbr:Ectothermic dbr:Trait_(biology) dbr:Symbiotic_bacteria dbr:Parasitism dbr:Species dbr:Cellular_respiration dbr:Insect dbr:Mite dbr:Gas_exchange dbr:Abdomen dbr:Spiracle_(arthropods) dbr:Insects dbr:Oxygen dbr:Hypercapnia dbr:Lepidoptera dbr:Biological_life_cycle dbr:Dust dbr:PH dbr:Metabolic_rate dbr:Carbon_dioxide dbr:Respirometry dbr:Artificial_selection dbr:Ventilation_(physiology) dbr:Frequency dbr:Adaptation dbr:Muscle dbr:Temperature
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dbo:abstract
Discontinuous gas-exchange cycles (DGC), also called discontinuous ventilation or discontinuous ventilatory cycles, follow one of several patterns of arthropod gas exchange that have been documented primarily in insects; they occur when the insect is at rest. During DGC, oxygen (O2) uptake and carbon dioxide (CO2) release from the whole insect follow a cyclical pattern characterized by periods of little to no release of CO2 to the external environment. Discontinuous gas exchange is traditionally defined in three phases, whose names reflect the behaviour of the spiracles: the closed phase, the flutter phase, and the open phase. Until recently, insect respiration was believed to occur entirely by simple diffusion. It was believed that air entered the tracheae through the spiracles, and diffused through the tracheal system to the tracheoles, whereupon O2 was delivered to the cells. However, even at rest, insects show a wide variety of gas exchange patterns, ranging from largely diffusive continuous ventilation, to cyclic respiration, of which discontinuous gas exchange cycles are the most striking. Discontinuous gas exchange cycles have been described in over 50 insect species, most of which are large beetles (order Coleoptera) or butterflies or moths (order Lepidoptera). As the cycles have evolved more than once within the insects, discontinuous gas exchange cycles are likely adaptive, but the mechanisms and significance of their evolution are currently under debate.
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wikipedia-en:Discontinuous_gas_exchange?oldid=1052291401&ns=0
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wikipedia-en:Discontinuous_gas_exchange