Applied Biology 787 



&W BC^^o) 



Fig. 374. — Life history of the sheep Hver fluke (Fasciola hepatica). A, Adult in 

 the sheep liver; B, egg passed from the body of the sheep; C, developing embryo 

 in the water; D, ciliated embryo (miracidium) in the water and ready to enter 

 the body of a snail; E and F, sporocyst containing rediae; G, redia containing 

 daughter rediae; H, redia of the second generation containing cercaria; I, cercaria 

 with tail; J, cercaria in water; K, cercaria encysted on grass; L, cercaria liberated 

 from cyst after ingestion by sheep; M, young fluke in sheep liver. Enlargements 

 of the various stages are indicated. (Reproduced by permission from Introduction 

 to Human Parasitology, eighth edition, by A. C. Chandler, published by John 

 Wiley & Sons, Inc., 1949.) 



