Describe the structure and life history of fasicola hepatica (Liver fluke).
Answers
Liver flukes are typical digenean trematodes and are commonly called “flatworms” or “flukes” on account of their flat, leaf-like structure. Fasciola hepatica is the common liver fluke of sheep. ... It is of much importance as it causes fascioliasis—a disease that causes damage to liver- tissues and bile ducts of sheep.
Definition of Earthworm
Earth worm is reddish brown invertebrate that inhabits the upper layer of the moist soil. They have a property to change the soil into uh fertile soil by addition of their secretion and also the makes the soil worm casting . the body is divided into hundreds of short segment.
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The earth was divided into three parts
- pro-clitellum - the mouth part .
- pre-clitellum - free path is from 14 to 16 which is covered by a prominent dark band of glandular tissue.
- post-clitellum - this is from the post to the anal part.
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The Peristomium is a part which helps the earth worm to make the hole into the soil and leave under the soil these are sensor is so that can feel where to to make the soil as a home .
After the clitellum there comes four pairs of spermathecal aperture this contains the sperm and at the middle there is a a single female genital pore. This helps in the reproduction .