Question

Differ phylum porifera and platyhelminthes

Answer 1

• Phylum Porifera :-

i ) The organism bear pores on their body.

ii ) The pores of the body is called Osti which is made-up of choanocytes. ( Special cell )

iii ) These are diploblastic.

iv ) These are Asymmetrical Or radially symmetrical.

v ) Cellular level of body organization.

E.g :- Euspongia and Spongilla


• Phylum Platyhelminthes

i ) These are flat worms

ii ) Excretory system is protonephridia which consists of flame cells ( Special cell )

iii ) these are tribalistic

iv ) These are bilaterally symmetrical.

v ) Organ level of body organization.

E.g. :- Tape warm and Fasciola

Answer 2

phylum prorifera :-

1) they have cellular level of organisations
2) muscles and nerve cells are absent.
3) digestion is intracellular.
4) these are non-motile (not moving ) animals
5) organisms have holes in their body which lead to canal system that helps in circulating water through out the body to bring food and oxygen.
6) covered with hard outside layer called skeletons.
ex- sylon , spongilla etc...

phylum platyhelminthes:-

1)these are bilaterally symmetrical and are dorsoventral animals (flattened)
2) their body is thin , soft , leaf - like or ribbon like structure
3) these are triploblastic i.e. ectoderm, endoderm and mesoderm .
4) these are acoelomate i.e. no body cavity is present
5) circulatory and respiratory systems and skeletons are absent .
6) digestive cavity with single opening
7) the mouth or anus is absent..
8) these animals are hermaphrodites i.e. having both female and makes reproductive organs .
9) these animals are free living live in both fresh water and terrestrial or land.
ex- trematoda , cestoda etc ..

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