4. How does water move
inside sponges? What is the
function of the pores in these
animals?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Sponges are filtering . They make
water their bodies by lateral
pores. Water circulates inside the
cavity and exits the
osculum.