The upper part of the trunk between the neck and the abdomen; it is formed by the 12 thoracic vertebrae, the 12 pairs of ribs, the sternum, and the muscles and fasciae attached to these; below, it is separated from the abdomen by the diaphragm; it contains the chief organs of the circulatory and respiratory systems. [L. fr. G. t., breastplate, the chest, fr. thoresso, to arm]
- barrel-shaped t. increased anteroposterior dimension of the t., so that lateral and anteroposterior dimensions are about equal, due to hyperinflation of the lungs. Seen in patients with emphysema.
- Peyrot t. an obliquely oval deformity of the chest in cases of a very large pleural effusion.

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tho·rax 'thō(ə)r-.aks, 'thȯ(ə)r- n, pl tho·rax·es or tho·ra·ces 'thōr-ə-.sēz, 'thȯr-
1) the part of the mammalian body that is situated between the neck and the abdomen and supported by the ribs, costal cartilages, and sternum also THORACIC CAVITY
2) the middle of the three chief divisions of the body of an insect also the corresponding part of a crustacean or an arachnid

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the chest: the part of the body cavity between the neck and the diaphragm. The skeleton of the thorax is formed by the sternum, costal cartilages, ribs, and thoracic vertebrae of the backbone. It encloses the lungs, heart, oesophagus, and associated structures. Compare abdomen.
thoracic adj.

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tho·rax (thorґaks) gen. thoґracis pl. thoґraces [Gr. thōrax] 1. [TA] chest: the part of the body between the neck and the thoracic diaphragm, encased by the ribs. 2. cavitas thoracis.

Medical dictionary. 2011.

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Look at other dictionaries:

  • THORAX — Le thorax des Vertébrés représente la partie supérieure ou céphalique du tronc. Dans le cas des Vertébrés aériens, exception faite, néanmoins, du cas des Batraciens, il s’agit d’une cage osseuse largement fenêtrée dont les mouvements incessants… …   Encyclopédie Universelle

  • Thorax — Tho rax, n. [L., fr. Gr. ?.] 1. (Anat.) The part of the trunk between the neck and the abdomen, containing that part of the body cavity the walls of which are supported by the dorsal vertebr[ae], the ribs, and the sternum, and which the heart and …   The Collaborative International Dictionary of English

  • thorax — chest, c.1400, from L. thorax, from Gk. thorax (gen. thorakos) breastplate, chest, of unknown origin …   Etymology dictionary

  • thorax — [thôr′aks΄] n. pl. thoraxes or thoraces [thôr′ə sēz΄] [ME < L < Gr thōrax, chest, breastplate] 1. in tetrapods, including humans, a) the part of the body cavity from the neck or head to the abdomen, containing the heart, lungs, etc.; chest …   English World dictionary

  • Thorax — (gr.), 1) Panzer, s.d. 1); 2) Schnürbrust; 3) Brust, auch der ganze Brustkasten; daher Thoraxarterie, s. Achselarterie; Thoraxgegenden (Regiones thoracicae), Abtheilungen der äußeren Fläche des Brustkastens. Man unterscheidet vorn: die… …   Pierer's Universal-Lexikon

  • Thorax — (griech.), Brustpanzer (s. Rüstung); in der Anatomie die Brust der Wirbeltiere und Gliederfüßer. Bei den letztern ist der T. zuweilen mit dem Kopf zur Kopfbrust (Cephalothorax) verwachsen …   Meyers Großes Konversations-Lexikon

  • Thorax — (grch.), Brustharnisch; anatomisch der Brustkasten, bei Insekten das Bruststück (s.d.) …   Kleines Konversations-Lexikon

  • Thorax — Thorax, griech., Brustharnisch; Brustkasten; Thorakocystes, Brustwassersucht …   Herders Conversations-Lexikon

  • Thorax — Thorax, 1) bei Wirbeltieren der von den Rippen gebildete Brustkorb; 2) aus drei Segmenten bestehender, zwischen Kopf und Abdomen liegender, Beine und Flügel tragender Teil des Körpers der Arthropoden …   Deutsch wörterbuch der biologie

  • Thorax — Thorax,der:⇨Brust(I,1) …   Das Wörterbuch der Synonyme

  • thorax — ► NOUN (pl. thoraces or thoraxes) 1) Anatomy & Zoology the part of the body between the neck and the abdomen. 2) the middle section of the body of an insect, bearing the legs and wings. ORIGIN Greek …   English terms dictionary

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