From professional translators, enterprises, web pages and freely available translation repositories.
the valves open when the co2 level in the insect rises to a high level; then the co2 diffuses out of the tracheae to the outside and fresh o2 diffuses in.
las válvulas se abren cuando el co2 en el insecto llega a un nivel alto; entonces el co2 se difunde fuera de las tráqueas en el exterior y entra aire fresco oxigenado.
==publications==* "observations on the tracheae of birds, with descriptions and representations of several not hitherto figured".
== algunas publicaciones ==* "observations on the tracheae of birds, with descriptions and representations of several not hitherto figured".
===metasoma===the metasoma (the "abdomen") of the ant houses important internal organs, including those of the reproductive, respiratory (tracheae), and excretory systems.
el metasoma (abdomen) de las hormigas alberga órganos internos importantes, incluidos los del sistema reproductor, respiratorio (tráquea) y excretor.