Top opening of a sponge is called osculum . it is used to expel water out .
That would be the osculum, my good sir.
Osculum
The large opening at the top of the sponge, where water leaves, is called the osculum. It is responsible for expelling the water and waste products from the sponge's body.
osculum - a large opening in a sponge through which water flows out of the sponge. Sponges may have more than one oscula.
caldera
Caldera
It is called the osculum.
tiny "whips" on the cells inside a sponge draw water in through the pores of thesponge. Food is then removed from the water before it leaves through the opening at the top of the sponge .
Well,it very clear to me that if you have wash dishes you would know. are you dumb? a sponge has 1 opening.
a sponge. ----------------------------------------------------------------------------------------------------------- ANSWER: A sponge, which has holes everywhere. -----------------------------------------------------------------------------------------------------------
A barrel sponge is a large brown sponge, Latin name Xestospongia testudinaria, from the waters of Australia and the Indian Ocean.
a large beaker and sponge
a hawsbill sea turtle
Water evaporate faster from a large opening.