ostium
ostium
Water is brought through cilia-lined pores into the hollow cavity of the sponge. As water passes through the pores, the cilia trap oxygen to breathe
Allow materials to enter and leave the sponge
Oh that's quite simple. Find a sponge and get a bowl. Put the sponge in the water and explain how the pores in the sponge suck in the water as you put pressure on it. As you squeeze it explain that the pores release the water through them.
Water is held in the sponge until it is released.
flagella
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 .
The size of a sponge does affect the amount of water absorbed. The bigger the sponge the more water absorbed.
Small pores of sponges are called ostia through which water enters while a large pore through which water exits is called osculum .
Something that is permeable has pores through which gas or liquid may pass or be absorbed through. An example would be, "A sponge is permeable because it can absorb water." or "Some cellular membranes are permeable."
"clean" water and "waste" water in a sponge are all the same. Their bodies allow constant flow of water, there is no beginning and end to a sponge; thus technically waste water leaves a sponges body through its many pores.
The body of a sponge is covered in tiny openings called pores. These pores allow water to flow in and out of the sponge, which helps the sponge filter out food particles and oxygen from the surrounding water.