Phylum ; Platihelminthes

                                 Class  ;  Cestode

                                 Example; Flat worms

This  phylum  includes   flatworms  dorsoventrally  flattened bodies  , laking  of  body  cavity . lacking  specialized  respiratory  circulatory systems.possess  a single  opening  for both   these  worms live as  parasitic  or  free living  . live  in  aquatic  ,terrestrial  or host    environments. Flat  worms  are  endoparasites of  vertebrates. It has  hooks  for  attachments,  complete lack  of  a digestive  systems because   it absorbs nutrients  directly  from  host  like   humans causing   issues like   abdominal  pain.

 

                      PHYLUM;  COELENTERATA

                              CLASS  ;  HYDROZOA

                                EXAMPLE ;  HYDRA

 

 

Phylum coelenterata    is  a group of  aquatic  or marine  organisms. They  found  attached  to rocks  at  the  bottom  of the sea They  are multicellular and  simplest  group  of  invertebrates.  This phylum is  otherwise  called as  Cnidaria.  Coelenterata  is divided  into  three  classes namely  Anthozoa,   Hydrozoa  , and  Scyphozoa.  Hydra  is     coming   under the class Hydrozoa. Body  is  radial  symmentry  in nature.  It  has stinging  cells  and  a  digestive  cavity . Hydra  are small  freshwater  polyps  found  attached  to vegetation in ponds ,feathering  tentacles  around a central mouth  to capture prey  like  insects.