The hydropathic encyclopedia : a system of hydropathy and hygiene in eight parts ..designed as a guide to families and students, and a text-book for physicians . posed ofthree coats : the external iscellular, or areolo-fibrous; themiddle is muscular, or, rather,a mixed tissue of elastic andcontractile fibres; and the in-ternal is nervous, or a serousmembrane, throughout whosesubstance are ramified thenerves of organic life. Theouter coat is firm and strong:the middle is thick and soft;and the internal thin and pol-ished. ARTERIAL SY8TEM. Distribution of Arteries.—All the arteries of the genera
The hydropathic encyclopedia : a system of hydropathy and hygiene in eight parts ..designed as a guide to families and students, and a text-book for physicians . posed ofthree coats : the external iscellular, or areolo-fibrous; themiddle is muscular, or, rather,a mixed tissue of elastic andcontractile fibres; and the in-ternal is nervous, or a serousmembrane, throughout whosesubstance are ramified thenerves of organic life. Theouter coat is firm and strong:the middle is thick and soft;and the internal thin and pol-ished. ARTERIAL SY8TEM. Distribution of Arteries.—All the arteries of the general sys-tem are branches of the aorta, which divide and subdivide to their finalramifications in the capillary system. From the aorta most of thebranches pass oil at right angles, which moderates the impetus of theblood; but in the extremities the branches leave the main artery at anacute angle, which favors the most rapid circulation. When an arterydivides, the area of its branches is always greater than that of the sin- * The term angeiology hae been applied to the vascular system ; it includes the blood-ressele, arteries, and veins, and the ARTERIES. The Nervesaccompany theArteries in eve-ry pari ot ANGEIOLOGY. 138 gle trunk; and the combined area of the ultimate ramifications of allthe arteries is vastly greater than that of the aortic trunk. This ar-rangement allows a more quiet motion of the vital current in the ex-treme vessels, where decomposition and recompo9ition of structuresare effected. All the arteries are invested with a fibro-cellular sheath,which also contains their accompanying veins, and sometimes a nerve. Intercommunication of Arteries.—In all parts of the body thearterial tubes communicate with each other by branches passing be-tween, called inosculations, or anastomoses. Those connections in-crease in frequency as the vessels diminish in size, so that then finaldistribution is a complete circle of inosculations. The advantage oft
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