| 1. | These embryos move to the brood sac and mature into cercaria.
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| 2. | The cercaria either infects vertebrates through the skin or is ingested.
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| 3. | The redia themselves house the asexual reproduction of free-swimming cercaria.
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| 4. | The cercaria has two suckers : a ventral sucker and rounded subterminal sucker.
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| 5. | Dragonflies are affected by three major groups of cercaria in a secondary host, a snail.
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| 6. | This system of asexual reproduction allows for an exponential multiplication of cercaria individuals from one miracidium.
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| 7. | Each cercaria has a chemosensory apparatus it must use to sniff out a tadpole within about 12 hours.
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| 8. | They become infected when the larvae ( cercaria ) of the worm penetrates the flesh of the fish.
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| 9. | The cercaria leaves the snail and encysts in the muscle of the connective tissue of fresh-water species.
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| 10. | Once inside of the fish muscle, the cercaria create a protective metacercarial cyst with which to encapsulate their bodies.
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