Elements of pathological anatomy . r the obvious reason that it takes thenew skin a much longer time to reach the centre in the former than in thelatter. A sore in the leg cicatrizes with more difficulty than one on the trunk ;and a callous ulcer than a soft one. When the cure is completed, a cicatrice is left, or, as it is called in familiarlanguage, a scar. This is always much smaller than the original sore, andstill further diminishes by the contraction of the new skin. When the breachof continuity has been of great extent, as when it has beenproduced by a burn, this contraction is often a
Elements of pathological anatomy . r the obvious reason that it takes thenew skin a much longer time to reach the centre in the former than in thelatter. A sore in the leg cicatrizes with more difficulty than one on the trunk ;and a callous ulcer than a soft one. When the cure is completed, a cicatrice is left, or, as it is called in familiarlanguage, a scar. This is always much smaller than the original sore, andstill further diminishes by the contraction of the new skin. When the breachof continuity has been of great extent, as when it has beenproduced by a burn, this contraction is often a source of great, Fig. 17. mischief and deformity. At first, the cicatrice is extremelyvascular, soft, and of a bluish color; afterwards the vesselsdecrease in size and number, and the part becomes dense,bloodless, and whiter than the original skin. This is wellseen in persons who have had confluent small-pox, and inthose who have been covered with venereal blotches. Thevessels of the cicatrice are curiously interlaced, and anas-11. S2 CICATRIZATION. tomose freely with each other, so as to form a very fine and delicate network,as in Fig. 17. Are the original textures, in the formation of cicatrices, always regenerated ?and, if so, in what respect, if any, do they differ from them? Cartilages andmuscles are said to be the only parts not susceptible of reproduction. Buteven this is extremely doubtful ; at any rate I am certain that I have seen mus-cles, which were almost entirely torn asunder, unite through the medium offleshy matter. Very recently, I had under my charge a healthy lad, elevenyears old, who had a large piece of the great pectoral and broad dorsal musclestorn away by a steam-engine, in which the breach of continuity was repairedby a substance perfectly identical with the original. The granulations wereunusually florid, highly sensitive, and grew wTith astonishing rapidity. In oldsubjects, it is not improbable that the junction is sometimes effected by car
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