Across
- 2. a modified type of collagen protein, forms the fibrous skeleton of most organisms among the phylum Porifera, the sponges.
- 3. one of the large tubular cells that constitute the wall of the incurrent canals in some sponges
- 5. ostium) are the inhalant pores in sponges through which water enters the body.
- 9. characterized by a fingerlike body shape known as the syconoid type of structure
- 10. lacks the ability of self-locomotion and is predominantly immobile
- 11. sponge larva having a complex structure in which the flagellated layer is restricted to numerous small interstitial chambers
- 12. the gelatinous matrix within a sponge
- 14. a mobile cell in the body of invertebrates including echinoderms, molluscs, tunicates, sponges and some chelicerates.
Down
- 1. are the thin, flattened cells of the epidermis, the sponge's outer layer of cells
- 4. are cells that line the interior of asconoid, syconoid and leuconoid body type sponges that contain a central flagellum, or cilium, surrounded by a collar of microvilli which are connected by a thin membrane.
- 6. an excretory structure in the living sponge, a large opening to the outside through which the current of water exits after passing through the spongocoel.
- 7. internal buds found in sponges and are involved in asexual reproduction.
- 8. A cavity, in the form of a bag or tube, lined with choanocytes, that forms the structure of sponges.
- 13. one of the minute calcareous or siliceous bodies that support the tissue of various invertebrates