*they have dorso-ventrally flat body, hence they are called flat worms.
*habitat-they are mostly parasite and few are free-living
*body form-flat body without segmentation
*symmetry-bilateral symmetry.
*germ layer-triploblastic
*level of organization-organ system level of oraganization
*body wall-it is soft and ciliated
*body cavity-they do not contain coelom,thus they are acoelomate. parenchyma tissue are present in cavity which help intransporting food material
*digestive tract-incomplete digestive tract.
*skeletal,respiratory and circulatory systems are absent
*excretory system- by flame cell
*nervous system-it is ladder like structure and consists of brain and two main longitudinal nerve
*reproductive system-these animals are generally hermaphrodite. the fertilization is always internal. asexual repriduction is by transverse binary fission.
*development- indirect.
*regeneration-well marked in Planaria.
*classification on the basis of mode of life-
*turbellaria-Dugesia
*termatoda-Fasciola
*cestoda-Taenia
*scientific name with their common names of some platyhelminthes-
Dugesia- planaria
Schistosoma- the blood fluke
Fasciola- the liver fluke
Taenia solium-tape worm
*habitat-they are mostly parasite and few are free-living
*body form-flat body without segmentation
*symmetry-bilateral symmetry.
*germ layer-triploblastic
*level of organization-organ system level of oraganization
*body wall-it is soft and ciliated
*body cavity-they do not contain coelom,thus they are acoelomate. parenchyma tissue are present in cavity which help intransporting food material
*digestive tract-incomplete digestive tract.
*skeletal,respiratory and circulatory systems are absent
*excretory system- by flame cell
*nervous system-it is ladder like structure and consists of brain and two main longitudinal nerve
*reproductive system-these animals are generally hermaphrodite. the fertilization is always internal. asexual repriduction is by transverse binary fission.
*development- indirect.
*regeneration-well marked in Planaria.
*classification on the basis of mode of life-
*turbellaria-Dugesia
*termatoda-Fasciola
*cestoda-Taenia
*scientific name with their common names of some platyhelminthes-
Dugesia- planaria
Schistosoma- the blood fluke
Fasciola- the liver fluke
Taenia solium-tape worm
LIVER FLUKE
PLANARIA
TAPE WORM
No comments:
Post a Comment