In Porifera [[1]] and [[2]] are the two types of pores present

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Detailed Solution

Concept: Porifera have a complex system of pores, which are organised in a way to form the canal system.
Pores are two types in Porifera.
In Porifera pores can be inhaled or exhaled.
Inhalant pores are known as osia and exhalant pores are known as oscula.
Hence, oscula and ostia are the correct answer.

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