Question about sponges?

[cichlidcichlid]

I need help answering a question about sponges.

Describe the structure of a sponge, the cell forms that form them, the pattern of the feeding current, how the current is created and how and where food is captured.

 

[TropicalNorth]

I'm doing second year (uni) invertebrate zoology how specific an answer do you need? Wikipedia has a fairly good description of sponges. http://en.wikipedia.org/wiki/Sponge