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METHODS OF STUDYING PARTHE
BIBLIOGRAPHY TO PART I
EGG AND MIRACIDIUM
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According activity adaptation adult animals apparently arranged authors become birds body cause cavity cells cercariae changes characteristic consists containing cycle cysts cytoplasm daughter definitive depends detected digestive eggs embryos emergence encyst enter entire evolution example excretory external factors Fasciola feeding final fish formation free living function genus germ cells Ginetsinskaya glands glucose glycogen hatching hepatica important includes increase individuals infection intensity intestine invasion known larvae light liver mature medium membrane metacercariae miracidia miracidium mode mollusks mother sporocyst movement nature observed occurs organs parasites parenchyma parthenitae parthenogenetic penetration period phase present reach rediae relation remain reported representatives reproductive result second intermediate host secretion sexual shell showed similar species sporocysts stage structure sucker suggests surface tail takes temperature tion tissues trematodes usually various vertebrates wall worms