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.
A sponge takes in water through its pores and in more advanced forms, with canals that move the water to all throughout the sponge. Then the oxygen from the water is used.
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 .
The surface of the orange puffball sponge is covered with small pores that filter small particles of food from the water that passes through them. Each sponge has flagella that help move the water through the sponge.
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."