. Fig. 156.—Drawing fiora a microscopic preparation, showing a haemorrhage in the parenchyma of the hver caused by the common liver fluke {Fasciola hepatica). a, Atrophic hver tissue ; h, round-cell infiltration ; c, a portion of the parasite; d, haemorrhage. (After Schaper, 1890, PL I., Fig. 1.) through the portal veins to the liver, where it develops into the adult hermaphrodite. From the above we see that this parasite runs through three genera- tions, namely: (1.) Ovum, miracidium, and sporocyst . . first generation. (2.) Redia . . second generation. (3.) Cercaria and adult . . third gener
. Fig. 156.—Drawing fiora a microscopic preparation, showing a haemorrhage in the parenchyma of the hver caused by the common liver fluke {Fasciola hepatica). a, Atrophic hver tissue ; h, round-cell infiltration ; c, a portion of the parasite; d, haemorrhage. (After Schaper, 1890, PL I., Fig. 1.) through the portal veins to the liver, where it develops into the adult hermaphrodite. From the above we see that this parasite runs through three genera- tions, namely: (1.) Ovum, miracidium, and sporocyst . . first generation. (2.) Redia . . second generation. (3.) Cercaria and adult . . third generation. During this curious development, which lasts about ten to twelve weeks, there is a constant potential increase in the number of individuals, for each sporocyst may give rise to several (five to eight) redijE, each redia to a larger number (twelve to twenty) cercarise, and each adult to an
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920
