This video lecture from Kingdom Animalia (F.Sc. First Year Biology) covers Phylum Nematoda (roundworms). Pseudocoelomate body plan, organs and organ systems, and life style have been discussed in detail. Emphasis has been given on parasitic roundworms. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.