This video lecture from Homeostasis (F.Sc. second year Biology) covers: Excretion in Earthworm and Cockroach. Earth worm have tubular excretory system (metanephridium) present in each segment, while cockroach has malpighian tubules to collect waste from heamolymph. 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.
