phylum annelida segmented worms

Features of Annelida..

Earthworm Occur in moist soil, fresh water and sea. Body is soft and segemented, triploblastic with bilateral symmetry. First animal with the coelom (body cavity). Body is covered by a non-chintinous cuticle which may have chitinous setae, or parapodia. Reproduction is generally sex..

Body is covered by a non-chintinous cuticle which may have chitinous setae, or parapodi..

Free-living, terrestrial or aquatic form (freshwater or marine). Body is long, cylindrical and metamerically segmented. Body wall consists of cuticle, epidermis and musculature. Body cavity is a true coelom, lined by epithelium. Digestive system is complete. Respiration i..

Phylum Aschelminthes (Round or Thread Worm) - Phylum Aschelminthes (round or thread worm) Or nemathelmenthes Ascaris Triploblastic body showing bilateral symmetry. Parasitic or free living. Body is long, smooth and cylindrical. Alimentary canal begins with th..

Triploblastic body showing bilateral symmetry. Alimentary canal begins with the mouth and ends with the anu..

Phylum Aschelminthes - Mostly parasitic (in animals and plants), a few free living called as flukes. Body is long, cylindrical, fusiform (pointed at both the ends). Body wall is composed of cuticle, epidermis and musculature. Presence of a false body pseudocoelom not lined by epithelium. ..

fig. 10.9 - Examples of PlatyhelminthesThe phylum is divided into three classes Characteristics Class Turbellaria Class termatoda Class Cestoda habit and habitat free living aquatic Ecto or endoparasites Endoparasites Digestive system Present Present Absent Examples Planaria Fasciola (Liv..

Phylum Arthropoda - This phylum is the largest in the animal kingdom comprising of more than 75% of the animal species that have been identified. Free living forms, aquatic (fresh water or marine) or terrestrial or aerial. Some parasitic forms also. Body is elongated and se..