Characteristics of important invertebrates

Characteristics of important invertebrates is given below:

      

     

      Jelly fish

• The body is made of two germ layers

          i.e. ectoderm and endoderm.

• The digestive cavity has only one Opening.
• There is no respiratory or circulatorySystem.
• There is no central nervous system
• Jelly fish are found in oceans.

     

 
     Planaria

• The body is made up of three germ

          Layers i.e. like ectoderm, mesoderm and

          Endoderm.

• The digestive cavity has only one Opening.
• They possess a definite head with sense Organs.
• Planaria are found in oceans and fresh waters.
• Planaria is an example of Asexual reproduction.

        

      Aedes aegypti

• It belongs to the major group of invertebrates i.e. “insects”.
• The body is divided into head, thorax and abdomen.
• They use wings for flight.
• They possess blood circulatory system and respire

Through special air tubes (tracheal tubes).

• It lives as free-living but the female transmits the virus

Of dengue fever from one human to the other.

• The mosquito originated in Africa but is now found throughout  the world.