Class 9
Chapter 7 Class 9 - Diversity In Living Organisms
  • They are bilaterally symmetrical, with a reduced coelomic cavity and little segmentation.
  • The size of a body varies from a microscopic to a giant form such as Octopus of up to 50 feet.
  •  The coelomic cavity is reduced.
  • They have an open circulatory system and kidney-like organs for excretion.
  • The muscular foot helps in locomotion.
  • Digestive tract has a simple structure.
  • They are mostly found in marine and freshwater. Very few are terrestrial and found in moist soil.
  • In some animals, sensory organs of touch, smell, taste, equilibrium and vision.

For Example: Snails, Mussels, Octopus 

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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