Tracheates
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Tracheates are a subphylum of arthropods that breathe through air tubes called tracheae, which open to the outside through spiracles. They are contrasted with gill-breathing arthropods and include classes such as primary tracheates, myriapods, and insects, with arachnids also being classified as tracheates despite some species lacking tracheae.
Encyclopedia entry (1928–1936)
Tracheates (Trachoata), a subphylum of the phylum Arthropoda, comprising all Arthropoda that breathe by means of air tubes called tracheae, which open to the outside through spiracles; tracheates are contrasted with gill-breathing arthropods, or Branchiata (crustaceans). Tracheates are divided into classes: 1) primary tracheates-Protracheata (Peripatus), 2) myriapods-Myriopoda, 3) insects-Insecta, s. Hexapoda. The class arachnids (Arachnoidea) is also classified as tracheates, although some of its representatives (e.g., scorpions and four-lunged spiders) lack tracheae and breathe with pulmonary organs, while in other spiders both pulmonary organs and tracheae are present.
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Cite this page
“Tracheates.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/tracheates/