Insecta

Insecta
The insects, the largest class of the phylum Arthropoda and the largest major grouping of living things, chiefly characterized by flight, great adaptability, vast speciation in terrestrial and freshwater environments, and possession of three pairs of jointed legs and, usually, two pairs of wings. Some are parasitic, others serve as intermediate hosts for parasites, including those that cause many human diseases. Some are wingless; others, such as the Diptera, have only one pair of wings. Respiration is by tracheoles, cuticle-lined air tubes that pass air directly to the tissues. Development in higher forms is holometabolous and passes through distinctive egg, larval, pupal, and adult stages. SYN: Hexapoda. [L. pl. of insectus, insect, fr. in-seco, pp. -sectus, to cut into]

* * *

In·sec·ta in-'sek-tə n pl a class of Arthropoda comprising segmented animals that as adults have a well-defined head bearing a single pair of antennae, three pairs of mouthparts, and usu. a pair of compound eyes, a 3-segmented thorax each segment of which bears a pair of legs ventrally with the second and third often bearing also a pair of wings, and an abdomen usu. of 7 to 10 visible segments without true jointed legs but often with the last segments modified or fitted with specialized extensions (as claspers, stingers, or ovipositors), that breathe air usu. through a ramifying system of tracheae which open externally through spiracles or gills, that exhibit a variety of life cycles often involving complex metamorphosis, and that include the greater part of all living and extinct animals
in·sec·tan -tən adj

* * *

In·sec·ta (in-sekґtə) [L., from in + sectum cut] a class of the Arthropoda whose members are characterized by division of the body into three parts: head, thorax, and abdomen; there are three orders of medical interest, Diptera, Hemiptera, and Siphonaptera.

Medical dictionary. 2011.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • insectă — INSÉCTĂ, insecte, s.f. (La pl.) Clasă care cuprinde mici animale nevertebrate din încrengătura artropodelor, cu corpul format din segmente diferenţiate în cap, torace şi abdomen, cu trei perechi de picioare articulate, respirând prin trahee sau… …   Dicționar Român

  • Insecta — In*sec ta, n. pl. [NL. See {Insect}.] 1. (Zo[ o]l.) One of the classes of Arthropoda, including those that have one pair of antenn[ae], three pairs of mouth organs, and breathe air by means of trache[ae], opening by spiracles along the sides of… …   The Collaborative International Dictionary of English

  • INSECTA — non in cibis solum apud varias gentes, ut fuci, formicae, pediculi, vermes, limaces etc. quae omnia Lex Iudaeis, ut immunda, prohibuit, nisi quod mellis et certae locustarum speciei usum iis concessit: Sed et in Deorum numero fuêre, ut de… …   Hofmann J. Lexicon universale

  • Insecta — Insecta, Insekten, Hexapoda, Kerbtiere, über 1 Mio. beschriebene Arten umfassende Klasse der ⇒ Antennata; artenreichste Klasse des Tierreichs. Der Körper ist stets in Kopf (Caput), dreigliedrigen Thorax (Pro , Meso , Metathorax) sowie ein primär… …   Deutsch wörterbuch der biologie

  • Insecta —   Insectos …   Wikipedia Español

  • Insecta — Insecte Wikipédia …   Wikipédia en Français

  • Insecta — Insekten Honigbiene (Apis mellifera) Systematik ohne Rang: Urmünder (Protostomia) Überstam …   Deutsch Wikipedia

  • Insecta — noun insects; about five sixths of all known animal species • Syn: ↑class Insecta, ↑Hexapoda, ↑class Hexapoda • Hypernyms: ↑class • Member Holonyms: ↑Arthropoda, ↑phylum Ar …   Useful english dictionary

  • Insecta (classification phylogenetique) — Insecta (classification phylogénétique) Cette page a pour objet de présenter un arbre phylogénétique des Insecta (ou Ectognatha, ou encore Insectes), c est à dire un cladogramme mettant en lumière les relations évolutives complexes (relations… …   Wikipédia en Français

  • Insecta Britannica Diptera — is a seminal work of entomology by Francis Walker. The most important part of the work was written jointly with Alexander Henry Haliday. It is the synonyma and the synoptic table.The dating of Insecta Britannica Diptera . The precise dates of… …   Wikipedia

  • Insecta (classification phylogénétique) — Cette page a pour objet de présenter un arbre phylogénétique des Insecta (Ectognatha, Insectes), c est à dire un cladogramme mettant en lumière les relations de parenté existant entre leurs différents groupes (ou taxa), telles que les dernières… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”