*habitat-all are marine
*habits-they are carnivorous and feed on plankton
*body form-they may be rounder, conical, oval or flattened
*symmetry-biradial i.e.-radial+bilateral
*germ layers-diploblastic
*level of organization-tissue level
*appendages-tentacles may or may not be present
*body wall-outer epidermis,inner-gastrodermis and middle-mesogloea. mesoglea is different from coelentrates.
*special adhesive cells are present on epidermis of tentacles called colloblast.
*locomotion-by cilia
*body cavity-they are acoelomates
*digestive tract-it consists of mouth, pharynax or stomodaeum, stomach or infundibulum;anal canal and two anal pores. digestive system is complete. both intra and extracellular digestion occurs.
*habits-they are carnivorous and feed on plankton
*body form-they may be rounder, conical, oval or flattened
*symmetry-biradial i.e.-radial+bilateral
*germ layers-diploblastic
*level of organization-tissue level
*appendages-tentacles may or may not be present
*body wall-outer epidermis,inner-gastrodermis and middle-mesogloea. mesoglea is different from coelentrates.
*special adhesive cells are present on epidermis of tentacles called colloblast.
*locomotion-by cilia
*body cavity-they are acoelomates
*digestive tract-it consists of mouth, pharynax or stomodaeum, stomach or infundibulum;anal canal and two anal pores. digestive system is complete. both intra and extracellular digestion occurs.
*skeletal,circulatory, respiratory and excretory system are absent.
*reproduction-by sexual mean
*ctenophora is classified into two classes-
tentaculata-they have tentacles. e.g.-Ctenoplana
nuda-they do not have tentacles. e.g.-Beroe
BEROE
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