Class 9
Chapter 7 Class 9 - Diversity In Living Organisms
  • Body is bilaterally symmetrical and triploblastic . However, the body is cylindrical rather than flattened.
  • There are tissues , but no real organs , although a sort of body cavity or a pseudocoelom, is present.
  • Most forms are parasitic but some are free- living in soil or water.
  • They are devoid of the circulatory system and respiratory system.
  • They exhibit tissue level organization.

For Example: Ascaris and Wuchereria

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo