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Vessel :: Vessel (n.) A continuous tube formed from superposed large cylindrical or prismatic cells (tracheae), which have lost their intervening partitions, and are usually marked with dots, pits, rings, or spirals by internal deposition of secondary membranes; a duct..

Tracheary :: Tracheary (n.) One of the Trachearia.

Tracheoscopy :: Tracheoscopy (n.) Examination of the interior of the trachea by means of a mirror.

Prototracheata :: Prototracheata (n. pl.) Same as Malacopoda.

Taenidium :: Taenidium (n.) The chitinous fiber forming the spiral thread of the tracheae of insects. See Illust. of Trachea.

Tracheophonae :: Tracheophonae (n. pl.) A group of passerine birds having the syrinx at the lower end of the trachea.

Peritracheal :: Peritracheal (a.) Surrounding the tracheae.

Trachea :: Trachea (n.) One of the respiratory tubes of insects and arachnids.

Tracheal :: Tracheal (a.) Of or pertaining to the trachea; like a trachea.

Tracheate :: Tracheate (a.) Breathing by means of tracheae; of or pertaining to the Tracheata.

Trachea :: Trachea (n.) The windpipe. See Illust. of Lung.

Tracheata :: Tracheata (n.pl.) An extensive division of arthropods comprising all those which breathe by tracheae, as distinguished from Crustacea, which breathe by means of branchiae..

Tracheate :: Tracheate (n.) Any arthropod having tracheae; one of the Tracheata.

Tracheae :: Tracheae (pl. ) of Trache.

Insecta :: Insecta (n. pl.) One of the classes of Arthropoda, including those that have one pair of antennae, three pairs of mouth organs, and breathe air by means of tracheae, opening by spiracles along the sides of the body. In this sense it includes the Hexapoda, or six-legged insects and the Myriapoda, with numerous legs. See Insect, n..

Spiracle :: Spiracle (n.) One of the external openings communicating with the air tubes or tracheae of insects, myriapods, and arachnids. They are variable in number, and are usually situated on the sides of the thorax and abdomen, a pair to a segment. These openings are usually elliptical, and capable of being closed. See Illust. under Coleoptera..

Protracheata :: Protracheata (n. pl.) Same as Malacopoda.

Trachea :: Trachea (n.) One of the large cells in woody tissue which have spiral, annular, or other markings, and are connected longitudinally so as to form continuous ducts..

Bronchia :: Bronchia (n. pl.) The bronchial tubes which arise from the branching of the trachea, esp. the subdivision of the bronchi..

Pauropoda :: Pauropoda (n. pl.) An order of small myriapods having only nine pairs of legs and destitute of tracheae.

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