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Thorax   Listen
noun
Thorax  n.  
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 vertebrae, the ribs, and the sternum, and which the heart and lungs are situated; the chest. Note: In mammals the thoracic cavity is completely separated from the abdominal by the diaphragm, but in birds and many reptiles the separation is incomplete, while in other reptiles, and in amphibians and fishes, there is no marked separation and no true thorax.
2.
(Zool.)
(a)
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.
(b)
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.
3.
(Antiq.) A breastplate, cuirass, or corselet; especially, the breastplate worn by the ancient Greeks.






Collaborative International Dictionary of English 0.48








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"Thorax" Quotes from Famous Books



... examined from the outside, we can make out by feeling two distinct regions, just as we might in the body of a man; anteriorily a bony cage, having the ribs at the sides, a rod-like bone in the front, the sternum (Figure 1 -st.-, [stm.]), and the backbone behind, and called the chest or thorax; and posteriorily a part called the abdomen, which has no bony protection over its belly, or ventral surface. These parts together with the neck constitute the trunk. As a consequence of these things, in the backbone of the rabbit there ...
— Text Book of Biology, Part 1: Vertebrata • H. G. Wells

... operations were possible. Very few of us have realized, however, the perfection to which anaesthesia was developed, and the possibility this provided for the great surgeons of the later medieval centuries to do operations in all the great cavities of the body, the skull, the thorax, and the abdomen, quite as they are done in our own time and apparently with no ...
— Old-Time Makers of Medicine • James J. Walsh

... conspicuous connection by which this is provided is the "vagus" nerve. This nerve passes out of the cerebral region as a portion of the voluntary system, and through it we control the vocal organs; then it passes onwards to the thorax sending out branches to the heart and lungs; and finally, passing through the diaphragm, it loses the outer coating which distinguishes the nerves of the voluntary system and becomes identified with those of ...
— The Edinburgh Lectures on Mental Science • Thomas Troward

... Bihan," I said; "by a stretch of imagination one can make out a skull on the thorax of a certain big sphinx moth. What ...
— Famous Modern Ghost Stories • Various

... although we have only the pelvis before us, to make reliable statements concerning the position of the bones of the lower extremities of *this individual. And we shall be able to say just what the form of the thorax and the curve of the vertebral column were. This, also, we shall have in our power, more or less, to ground on the child-bearing function of woman. But we might go still further and say that this individual, who, according to its pelvic cavity, was a woman, ...
— Robin Hood • J. Walker McSpadden

... constructed—which present a very curious approximation to both the form and, in a certain respect, the structure of true bivalves. Allusion is here made to certain small Crustacea—certain phyllopods and ostracods—which have the hard outer coat of their thorax so modified as to look wonderfully like a bivalve shell, although its {80} nature and composition are quite different. But this is by no means all,—not only is there this external resemblance between the thoracic armour of the crustacean and the bivalve shell, ...
— On the Genesis of Species • St. George Mivart

... London. He still had that ultra-youthful figure that partook the traits of the hobbledehoy, arrived at man's stature, but not yet possessing the full manly proportions. His extremities were large, his limbs long, his face small, and his thorax very partially developed, especially in girth. An habitual eagerness of mood, thrusting forward his face, made him stoop, with sunken chest and rounded shoulders; and this was even more apparent in the ...
— Atlantic Monthly, Vol. XI., February, 1863, No. LXIV. • Various

... structure that propels the blood by alternate contractions and dilatations, which in the mammalian embryo first appears as two tubes lying under the head and immediately behind the first visceral arches, but gradually moves back and becomes lodged in the thorax." ...
— The Patrol of the Sun Dance Trail • Ralph Connor

... talking!" said O'Shaughnessy, springing from his seat and crossing the room with tremendous strides, "croaking away there as if the bullet was in your thorax. Hang it, man, ...
— Charles O'Malley, The Irish Dragoon, Volume 1 (of 2) • Charles Lever

... to want to win. In his eyes a true sport was a man who would start in a foot race and come in half a mile behind carrying the other fellow's coat. Our peculiar style of pushing a football right through the thorax of the whole Middle West nearly made him shudder his shoes off and every fall in chapel he delivered a talk against the reprehensible state of mind that finds pleasure in the defeat of others. We always cheered those talks, which pleased him; but he never could understand ...
— At Good Old Siwash • George Fitch

... secured myself against by getting a lay figure of Korinski's height, dressing it to resemble him, placing a pistol in its hand, and then practising at this mark in the woods. After a short time I could send a bullet through the thorax without taking more than a hasty glance at ...
— The Lock and Key Library • Julian Hawthorne, Ed.

... that if certain areas on the skin are agitated, the subject is given super-sensorial impressions enabling him to see objects that he could not otherwise perceive. To enable his subject to discern things on the other side of a wall, Professor Calligaris pressed on a spot to the right of the thorax for fifteen minutes. Dr. Calligaris said that if other spots of the body were agitated, the subjects could see objects at any distance, regardless of whether they had ever ...
— Autobiography of a YOGI • Paramhansa Yogananda

... direct you where to enter and how far to go, but pray let it be as near the left side as possible." Wagtail, who took this proposal seriously, observed, that it would be a very difficult matter to penetrate into the left side of the thorax without hurting the heart, and in consequence killing the patient; but he believed it was possible for a man of a very nice hand and exact knowledge of anatomy, to wound the diaphragma somewhere about the skirts, which might induce a singultus, without being ...
— The Adventures of Roderick Random • Tobias Smollett

... hours after death. Slobbering at the mouth; head caved in; immense rigor mortis; eyes dilated and gouged out; abdomen lacerated; hemorrhage from left ear. Head. Water on the brain; scalp congested, rather; when burst with a mallet interior of head resembled a war map. Thorax. Charge of buckshot in left lung; diaphragm suffused; heart wanting-finger marks in that vicinity; traces of hobnails outside. Abdomen. Lacerated as aforesaid; small intestines cumbered with brick dust; slingshot in duodenum; boot-heel ...
— The Fiend's Delight • Dod Grile

... princess Amelia might be called; but before she could reach the apartments he had expired. An attempt was made to bleed him, but without effect: and indeed his malady was far beyond the reach of art; for when the cavity of the thorax or chest was opened, and inspected by the sergeant-surgeons, they found the right ventricle of the heart actually ruptured, and a great quantity of blood discharged through the aperture into the surrounding pericardium; so that he must have died ...
— The History of England in Three Volumes, Vol.II. - From William and Mary to George II. • Tobias Smollett

... will find a great number under the stones on the waste land of a long, smooth, jet-black beetle (a great many of these); also, in the same situation, a very small pinkish insect, with black spots, with a curved thorax projecting beyond the head; also, upon the marshy land over the ferry, near the sea, under old sea-weed, stones, etc., you will find a small yellowish transparent beetle, with two or four blackish marks on the back. ...
— The Life and Letters of Charles Darwin, Volume I • Francis Darwin

... My ancestors had all melted away with hereditary consumption. At the age of twenty, I began to be afflicted with pain in different parts of the thorax, and other premonitory symptoms of phthisis pulmonalis. Soon after this, my mother and eldest sister died with the disease. For myself, having a severe attack of ague and fever, all my consumptive symptoms became greatly aggravated; the pain was shifting—sometimes between ...
— Vegetable Diet: As Sanctioned by Medical Men, and by Experience in All Ages • William Andrus Alcott

... that the Fourth is the day when your patriotic voice should climb out of your thorax and make the welkin ring, but it isn't really necessary to get up a row between a stick of dynamite and a keg of giant powder to prove that you love the ...
— Skiddoo! • Hugh McHugh

... that of the people who have studied insects most and know them best, we must include among the true insects only such air-breathing animals as have six legs, no more, and have the body divided into three parts—head, thorax, and abdomen. These parts are clearly shown in Fig. 136, which represents the ant, a true insect. All insects do not show the divisions of the body so clearly as this figure shows them, but on careful examination you can usually make them out. The head bears one pair of feelers, ...
— Agriculture for Beginners - Revised Edition • Charles William Burkett

... piece of goods however was in more pressing demand; a solid German, with massive thorax half-hidden beneath a shaggy goatskin held in at the waist by a belt; his hairy arms bare to the shoulder, his gigantic fists clenched as if ready to fell ...
— "Unto Caesar" • Baroness Emmuska Orczy

... must be taken to prevent organismal contamination of the serum or of the apparatus by means of which it is injected. Syringes are so made that they can be sterilised by boiling. The best situations for injection are under the skin of the abdomen, the thorax, or the buttock, and the skin should be purified at the seat of puncture. If the bulk of the full dose is large, it should be divided and injected into different parts of the body, not more than 20 c.c. being injected at one place. The serum may be introduced directly into a vein, ...
— Manual of Surgery - Volume First: General Surgery. Sixth Edition. • Alexis Thomson and Alexander Miles

... was an Artery, fill'd with injection; And B was a Brick, never caught at dissection. C were some Chemicals—lithium and borax; And D was a Diaphragm, flooring the thorax. ...
— Punch, or the London Charivari, Vol. 1, November 27, 1841 • Various

... as a worm," to point to the lack of any defensive covering. Now the Lampyris is clothed, that is to say, he wears an epidermis of some consistency; moreover, he is rather richly coloured: his body is dark brown all over, set off with pale pink on the thorax, especially on the lower surface. Finally, each segment is decked at the hinder edge with two spots of a fairly bright red. A costume like this was never worn by ...
— The Glow-Worm and Other Beetles • Jean Henri Fabre

... about magnetism, he suggested making a very thin needle into a magnet; then breaking it into very short pieces, which would still be magnetic, and fastening one of these pieces with some cement on the thorax of the ...
— More Letters of Charles Darwin - Volume I (of II) • Charles Darwin

... Open the thorax with all aseptic precautions, and collect as much blood as possible from the heart with ...
— The Elements of Bacteriological Technique • John William Henry Eyre

... April 17, was concerned with a description of the organs of the thorax, and after a discussion on the structure and action of ...
— The Evolution of Modern Medicine • William Osler

... of the insect is as clearly composed of distinct segments as the body of the annelid. Of these there are perhaps typically eleven. The thorax is composed of three segments, distinct in the lowest forms, fused in the highest. This fusion of segments in the thorax of the highest forms furnishes a very firm framework for the attachment of wings and muscles. These wings ...
— The Whence and the Whither of Man • John Mason Tyler

... further examination of the Professor's rooms on Saturday had resulted in the discovery, in a tea-chest in the lower laboratory, of a thorax, the left thigh of a leg, and a hunting knife embedded in tan and covered over with minerals; some portions of bone and teeth were found mixed with the slag and cinders of one of the furnaces; also some fish-hooks and a quantity of twine, the latter identical ...
— A Book of Remarkable Criminals • H. B. Irving

... an instance of this law of compensation,—those species of Carnivora which have the canine teeth greatly developed have certain molar teeth deficient; or again, in that division of the Crustaceans in which the tail is much developed, the thorax is little so, and the converse. The points of difference between different races is often strikingly analogous to that between species of the same genus: trifling spots or marks of colour{261} (as the bars on pigeons' wings) are often preserved in races of plants and animals, precisely ...
— The Foundations of the Origin of Species - Two Essays written in 1842 and 1844 • Charles Darwin

... caught four perches, one of which weighed two pounds. The purple ant of the east coast has disappeared, and a similar one with brick-coloured head and thorax, but by no means so voracious, has ...
— Journal of an Overland Expedition in Australia • Ludwig Leichhardt

... severe sore throat. The journals in Mr. Slang's interest deplored this illness pathetically; while the papers in the interest of the opposition theatre magnified it with great malice. "The new singer," said one, "the great wonder which Slang promised us, is as hoarse as a RAVEN!" "Doctor Thorax pronounces," wrote another paper, "that the quinsy, which has suddenly prostrated Mrs. Ravenswing, whose singing at the Philharmonic, previous to her appearance at the 'T.R——,' excited so much applause, has destroyed the lady's voice for ever. We luckily need no other prima donna, when ...
— Men's Wives • William Makepeace Thackeray

... regret that I am not able to give the detailed characters of this genus at present. I shall merely, therefore, say that it has the broken clavate antennae of Phalidura, only they are here longer than the head and thorax taken together. The body is very convex:, having the thorax as wide as the abdomen, subquadrate, with very convex sides. Abdomen joined to thorax by a distinct peduncle. Elytra very convex, with almost perpendicular sides. Feet long, ...
— Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2] • Phillip Parker King

... engraving herewith are shown the male and female of the Hercules beetle (Dynastes hercules) of Brazil. The family of the Dynastidae comprises some of the largest and most beautiful of the beetle race, and all of them are remarkable for enormous developments of the thorax and head. They are all large bodied and stout limbed, and by their great strength abundantly justify their generic name, Dynastes, which is from the Greek and signifies powerful. The larvae of ...
— Scientific American, Volume XLIII., No. 25, December 18, 1880 • Various

... place the patient on his face, and turn the body gently but completely on the side and a little beyond, then again on the face, and so on alternately. Repeat these movements deliberately and perseveringly, fifteen times only in a minute. (When the patient lies on the thorax, this cavity is compressed by the weight of the body, and expiration takes place. When he is turned on the side, this pressure ...
— How to Camp Out • John M. Gould

... mimicry not yet noticed by any naturalist is seen in another grasshopper, also common in La Plata (Rhomalea speciosa of Thun-berg). This is an extremely elegant insect; the head and thorax chocolate, with cream-coloured markings; the abdomen steel-blue or purple, a colour I have not seen in any other insects of this family. The fore wings have a protective colouring; the hind wings are bright red. When at rest, with ...
— The Naturalist in La Plata • W. H. Hudson

... nerve, which he reached: a nerve which, when deadened by Oriental skill, paralyzes the vocal chords. Not a sound emanated from the mysterious man, even when Shirley's right hand shot forward, under the chin of the other, for a deft blow across the thorax. ...
— The Voice on the Wire • Eustace Hale Ball

... perceive, through the transparent shell, while the Animal surviv'd, several motions in the head, thorax, and belly, very distinctly, of differing kinds which I may, perhaps, elsewhere endeavour more accurately to examine, and to shew of how great benefit the use of a Microscope may be for the discovery of Nature's ...
— Micrographia • Robert Hooke

... a pair of eyes were turned kindly enough upon the youths—eyes that glistened in a way that rather suggested the nearness of water. "All a pack o' nonsense! If a man is no' ready to help his fellow-creatures when they need him—well, I'm thinking that he ought to have a pin stuck through his thorax and mounted in a box among my moths, labelled, 'A horrible freak o' Nature.' And I'd have you know, too, that my name is Mackintosh—Skipper Mackintosh. There's no 'Misters' in the backwoods. 'Skipper' is the name that my auld faither gave me to commemorate his discovery o' a new ...
— The Fiery Totem - A Tale of Adventure in the Canadian North-West • Argyll Saxby

... what is commonly called sneezing. But if the number of muscles agitated, the force and straining of the body by sneezing, are considered; the slightness of the cause must excite no little astonishment; for this action is occasioned by the muscles of the scapula, abdomen, diaphragm, thorax, lungs, &c. and if the sneezing continues, an universal explosion of the liquids ensues: tears, mucus, saliva, and urine, are excreted. Thus, without any moist, cold, hot, dry, sulphur, salt, or any other internal or external application, ...
— A Treatise on Foreign Teas - Abstracted From An Ingenious Work, Lately Published, - Entitled An Essay On the Nerves • Hugh Smith

... to return to the heart by the compression of the veins, it rushes to the brain, and the man dies. Also, and as an additional cause of dissolution, the lungs no longer receive the needful supply of the vital air, owing to the ligature of the cord around the thorax; and ...
— The Fair Maid of Perth • Sir Walter Scott

... considered of great medicinal value. They filled caps, sacks, bamboo joints, and every receptacle which they could find after each man had drunk all he could possibly force down his throat and had eaten the huge clots which choked the thorax. ...
— Camps and Trails in China - A Narrative of Exploration, Adventure, and Sport in Little-Known China • Roy Chapman Andrews and Yvette Borup Andrews

... exist without producing so great disorder of the functions of that and of other parts, as to be sufficiently conspicuous by external signs; but, as these somewhat resemble the symptoms of different complaints, especially of asthma, phthisis pulmonalis, and water in the thorax, it has happened, that each of these has been sometimes confounded with the former[1]. The object of the following statement of cases is to shew, that, whatever resemblance there may be in the symptoms of the first, ...
— Cases of Organic Diseases of the Heart • John Collins Warren

... lungs; also that all the viscera of the entire body are joined through ligaments to the chamber of the breast; and so joined that when the lungs respire, each and all things, in general and in particular, partake of the respiratory motion. Thus when the lungs are inflated, the ribs expand the thorax, the pleura is dilated, and the diaphragm is stretched wide, and with these all the lower parts of the body, which are connected with them by ligaments therefrom, receive some action through the pulmonic action; not to mention further facts, lest ...
— Angelic Wisdom Concerning the Divine Love and the Divine Wisdom • Emanuel Swedenborg

... The Thorax. An increase or decrease in the number of ribs is found in 12% of criminals. This is an atavistic character common to animals and lower or prehistoric human races and contrasts with the numerical uniformity ...
— Criminal Man - According to the Classification of Cesare Lombroso • Gina Lombroso-Ferrero



Words linked to "Thorax" :   breast, female chest, chest, pectoralis, thoracic aorta, prothorax, vertebrate, body, thoracic cavity, arthropod, vena thoracica, thoracic vein, pectoral, body part, pectoral muscle, sternum, insect, rib cage, area of cardiac dullness, chest cavity, bust, musculus pectoralis, gall bladder, torso, breastbone



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