Classification of Animal Kingdom

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Classification of Animal Kingdom

5. Phylum Aschelminthes

» Its a Round worm
» Long, cylindrical, unsegmented worm.
» Bilaterally symmetrical and triploblastic.
» Alimentary canal is complete in which mouth and anus both are present.
» There is no circulatory and respiratory systems but nervous system is developed.
» Excretion takes place through Protonephridia.
» They are unisexual.
» Most form are parasitic but some are free living in soil and water.
Example - Round worm, like - Ascaris, Thread worm, Wuchereia etc.

1. Enterobius (pin worm/thread worm) - It is found mainly in the anus of child. Children feel itching and often vomits. Some children urinate on the bed at night.
2. Filarial disease is caused by Wuchereia bancrofti.

6. Phylum Annelida

» It is Annulus body Bearing ring.
» Body is long, thin, soft and metamerically segmented.
» Locomotion takes place through Setae made up of Chitin.
» Alimentary canal is well developed.
» Normally respiration through skin, in some animals it takes place through gills.
» Nervous system is normal and blood is red.
» Excretion by nephridia.
» True coelom is present.
» Both unisexual and bisexual.
Example -Earthworm, Nereis, Leech etc.

7. Phylum Arthropoda

» It is Jointed leg.
» Body is divided into three parts - Head, Thorax and Abdomen.
» Body is covered with a thick chitinous exoskeleton.
» Circulatory system is open type.
» Its body cavities are called haemocoel.
» Tracheai, book lungs, body surface are respiratory organ.
» These are mainly unisexual and fertilization takes place inside the body.
Example - Cockroach, prawn, crab, bug fly, mosquito, bees etc. 1. There are six feet and four wings in insects.
2. There are 13 chamber in the Cockroach's heart.
3. Ant is a social animal which reflects labour division.
4. Termite is also a social animal which lives in colony.
5. The main excretory organ of insects are malpighian tubules.

Phylum Mollusca

» It is Soft bodies animal.
» All the animals in this group are marine.
» Water vascular system is present.
» There is Tube feet for locomotion, taking food which works as sensation organ.
» Brain is not developed in nervous system.
» There is a special capacity of regeneration.
Example -Star fish, Sea urchin, Sea cucumber, Brittle stars etc.

1. The function of the Aristotle lantern is to chew the food.
2. It is found in sea urchin.

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