Zoology Crossword

2. are tubular cells which make up the pores of a sponge known as ostia.
4. a small mouthlike aperture, as of a sponge.
6. a scleroprotein occurring in the form of fibers that form the skeleton of certain sponges.
7. a type of sponge having a n oval shape and a thin body wall with pores leading directly into the spongocoel.
10. One of the small, hard, calcareous or siliceous bodies that serve as the skeletal elements of various marine and freshwater invertebra
12. a migratory, ameboid cell found in many invertebrates that functions in excretion, assimilation, etc.
13. an asexually produced mass of cells that is capable of developing into an animal, as a freshwater sponge.
14. An ostium (plural ostia) in anatomy is a small opening or orifice.

1. a type of sponge having a thick body wall that is folded to form many short canals leading to the spongocoel.
3. one of the flagellated cells lining the inner cavity of a sponge, having a collar of protoplasm encircling the base of the flagellum.
5. the sponge's outer layer of cells. porocyte. cells with pores that allow water into the sponge; they are located all over the sponge's body.
8. fixed in one place; immobile.
9. is the gelatinous matrix within a sponge. It fills the space between the external pinacoderm and the internal choanoderm.
11. a type of sponge having a thick body wall with a highly branched canal system leading into the spongocoel.