Porifera Vocabulary

4. embryogenesis Development of a new sponge from fragments or aggregates of cells
5. egg cell
9. large central cavity of the sponge
10. and lophocytes cells that secrete collagen
12. cells Inner layer which pumps water through the sponge using flagella and filters out the food
13. Calcarea Sponges with calcium carbonate spicules.
15. Specialized cell type that secretes the spongin in fresh and salt water sponges
16. cell that secretes silica spicules into the mesohyl
20. gelatinous matrix within a sponge
22. opening at the top of the sponge
23. cells that make up the outer covering or "skin" of a sponge
25. Simplest form of sponges, with canals leading directly from the outside to the interior
26. cell that controls water flow through the ostia
27. Hexactinellida glass sponges with six-rayed siliceous spicules

1. a type of amoebocyte capable of developing into other types of cells
2. internal buds coated with spongin and spicules
3. cellular eating
6. the phylum of sponges, pore bearing
7. single body layer
8. Demospongiae spicules make of silica but not 6 rayed. most sponges
10. Collar cells that line the body cavity and have flagella that circulate water in sponges
11. Flexible protein fibers that make up the skeleton of some sponges.
14. pores on a sponge that allow the passage of water, oxygen and nutrients
17. choanocytes line the surfaces of chambers that branch off canals leading away from the spongocoel, most complex sponge
18. sponge with choanocytes in canals that empty into the spongocoel
19. within the body wall of a sponge, a specialized cell that crawls about and delivers nutrients from the choanocytes to the rest of the body cells
21. tiny, hard particles of calcium carbonate or silicon dioxide that are often shaped like spikes and form the skeleton of sponges
24. multicellular animals