Porifera: Sponges

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Across
  1. 3. fertilization occurs outside the animal's body
  2. 4. an animal that can produce both eggs and sperm
  3. 7. freshwater sponges produce seedlike particles
  4. 9. an organism feeds by filtering small food particles from water
  5. 10. water travels out of this
  6. 12. distributes food & oxygen to the epidermis cells
  7. 13. reproduction by budding, fragmentation, or gemmule formation
  8. 14. soft supportive network of protein fibers
  9. 15. circulate water through sponge
  10. 16. no specific shape
  11. 17. external growth on a sponge
Down
  1. 1. outer layer of the sponge is the epidermis which is made of flat cells
  2. 2. supportive nextwork of tiny, hard particles
  3. 5. missing body parts are re-grown
  4. 6. the eggs inside the animal's body are fertilized by sperm from another sponge
  5. 8. attached to some surface
  6. 11. pieces of sponge break off