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Pleura :: Pleura (n. fem.) The smooth serous membrane which closely covers the lungs and the adjacent surfaces of the thorax; the pleural membrane.

Prosoma :: Prosoma (n.) The anterior of the body of an animal, as of a cephalopod; the thorax of an arthropod..

Manitrunk :: Manitrunk (n.) The anterior segment of the thorax in insects. See Insect.

Scutellum :: Scutellum (n.) The third of the four pieces forming the upper part of a thoracic segment of an insect. It follows the scutum, and is followed by the small postscutellum; a scutella. See Thorax..

Parapterum :: Parapterum (n.) A special plate situated on the sides of the mesothorax and metathorax of certain insects.

Mediastinum :: Mediastinum (n.) A partition; a septum; specifically, the folds of the pleura (and the space included between them) which divide the thorax into a right and left cavity. The space included between these folds of the pleura, called the mediastinal space, contains the heart and gives passage to the esophagus and great blood vessels..

Breast :: Breast (n.) Either one of the protuberant glands, situated on the front of the chest or thorax in the female of man and of some other mammalia, in which milk is secreted for the nourishment of the young; a mamma; a teat..

Trunk :: Trunk (n.) That segment of the body of an insect which is between the head and abdomen, and bears the wings and legs; the thorax; the truncus..

Rib :: Rib (n.) One of the curved bones attached to the vertebral column and supporting the lateral walls of the thorax.

Coarctate :: Coarctate (a.) Pressed together; closely connected; -- applied to insects having the abdomen separated from the thorax only by a constriction.

Prosternum :: Prosternum (n.) The ventral plate of the prothorax of an insect.

Cephalothorax :: Cephalothorax (n.) The anterior portion of any one of the Arachnida and higher Crustacea, consisting of the united head and thorax..

Thorax :: Thorax (n.) The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix..

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..

Prophragma :: Prophragma (n.) An internal dorsal chitinous process between the first two divisions of the thorax of insects.

Pyopneumothorax :: Pyopneumothorax (n.) Accumulation of air, or other gas, and of pus, in the pleural cavity..

Thorax :: Thorax (n.) A breastplate, cuirass, or corselet; especially, the breastplate worn by the ancient Greeks..

Thorax :: Thorax (n.) The middle region of the body of an insect, or that region which bears the legs and wings. It is composed of three united somites, each of which is composed of several distinct parts. See Illust. in Appendix. and Illust. of Coleoptera..

Pneumatothorax :: Pneumatothorax (n.) See Pneumothorax.

Bell Bearer :: Bell bearer () A Brazilian leaf hopper (Bocydium tintinnabuliferum), remarkable for the four bell-shaped appendages of its thorax..

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