ANIMAL KINGDOM Part-11, NCERT Class-11
Phylum – Aschelminthes • Body is Circular in cross-section. • Also called ROUNDWORM . • Free-living , aqatic , terrestrial , parasitic . • Organ level of body organisation is seen • Bilaterally Symmetrical , Triploblastic , Pseudocoelomate . • Alimentary canal complete with well developed Muscular Pharynx . • Body waste is removed by an Excretory Tube through an Excretory Pore . • DIOECIOUS (Sex is seperate) • Oftern seen that Female are longer than male • Internal Fertilization • Development Direct / Indirect . Exmple: • Ascaris (Roundworm) • Wuchereria (Filaria worm) • Ancylostoma (Hookworm) Example of Aschelminthes: Ascaris