The class-book of anatomy : designed for schools, explanatory of the first principles of human mechanism, as the basis of physical education . rial is manufactured of whichit is originally made. Authors detail the particulars of what they call thetwo circulations, — viz. the greater and lesser, by which isto be understood, that the right heart and lungs constitutethis lesser, because the force of the engine is only exertedto throw its contents into the air cells of the lungs. Onthe other hand, the greater circulation, means the leftheart and all the arteries leading from it, quite to the ex-tr
The class-book of anatomy : designed for schools, explanatory of the first principles of human mechanism, as the basis of physical education . rial is manufactured of whichit is originally made. Authors detail the particulars of what they call thetwo circulations, — viz. the greater and lesser, by which isto be understood, that the right heart and lungs constitutethis lesser, because the force of the engine is only exertedto throw its contents into the air cells of the lungs. Onthe other hand, the greater circulation, means the leftheart and all the arteries leading from it, quite to the ex-tremities. As the power to be exerted by the left heart, in orderto-throw the blood the entire length of the body, is vastlysuperior to its fellow, which is only required to push itsvolume of blood about ten inches, so it is proportionablystronger in its substance ; thicker in its walls, and moresensitive to the application of stimuli. In the act of dying,the left heart invariably clears all its cavities, — and there-fore is always empty on dissection, but the right heart re-mains full and burthened. ANATOMICAL CLASS 55. 125. Explanation of Fig. double heart of man : - q, descending vena cava ; o, ascend-iuT^nacava; n, right auricle ; b, right ventricle; k, pulmonaryafterv iTrUi md left branches of this artery, going to theluSneihcVside of the chest; m,m, veins of the what the artery sent in, to r, the left auricle; a, the left ven-tricle ce,f, aorta or great artery of the body, rising out of the efthewt e arteria innominata; i, the subclavian artery, going to theleft arnf the carotid artery, which goes up the side of the neck 0 hehead Vofe-the arrows show the course the blood movesn each of he vessels demonstrated with the heart; n, right auricle; m,X veins of the lungs; s, left coronary artery. P, veins returninghlnnrt from the liver and bowels. The e?s no essential difference In the external appearance or in-ternaf organization of the he
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Keywords: ., bookcentury1800, bookdecade1830, booksubjectanatomy, bookyear1834
