WebJun 26, 2024 · Download the app for Live interactive classes at the lowest price possible. The courses contain Live classes, recorded videos of the live classes, DPPs, Chap... WebThe clitellum is part of the reproductive system of clitellates, a subgroup of annelids which contains oligochaetes (earthworms) and hirudineans (leeches). The clitellum is a thick, saddle-like ring found in the epidermis (skin) of the worm, usually with a light-colored pigment. To form a cocoon for its eggs, the clitellum secretes a viscous ...
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WebJan 24, 2024 · Nereis: 1. The systematic position of Nereis is – Kingdom: Animalia Phylum: Annelida Class: Polychaeta Order: Phyllodocida Family: Nereididae Genus: Nereis 2. They are commonly known as clam worms or sandworms. 3. They are marine nocturnal and carnivorous animals. 4. They are found in the burrows on tidal areas of the seashore. 5. http://jupiter.plymouth.edu/~lts/invertebrates/primer/text/polychaeta.html howling wizard of haven
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WebApr 10, 2024 · The body of leeches is formed with several ring-like structures. The execution organ is nephridia. Leeches have a closed circulatory system. Leeches have real Silom covered with mesoderm. The nervous system is formed with a pair of cerebral ganglia and two axial nerves. Habitation of Leeches Leeches live in the land mainly. WebNereis, found that this form, when placed in glass tubes simulating their natural environment, displayed a constant rate of oxygen in-take over a moderate range of oxygen tension. In view of the wide diversity in the habitat of the two animals, the results obtained on leeches compare quite favorably with those obtained by Hyman for Nereis. WebThese organisms may grow up to 20 cm and are active carnivores that feed chiefly on other polychaetes, including Nereis, which may be up to three times the length of the sea mouse. The setae on the dorsal surface are iridescent and have a red sheen that may warn off predators. Dorsal surface Lab-7 09 howling with pain