Question

ostim difrence between osculam

Answer 1

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Osculum: A large opening in a sponge through water flows out of the sponge. the sponge may have more than one Osculum. Ostia: A series of tiny pores all over the body of a sponge that let water into the sponge. One of these is called Ostium.

Answer 2

 OSTIUM : a series of tiny pores all over the body of a sponge that let water into the sponge. One of these is called an ostium.
OSCULUM  - a large opening in a sponge through which water flows out of the sponge. Sponges may have more than one oscula.