Marine Biology
ch.7 sponges
Terms
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- Sponge
- mostly marine
- Sponge
- lacks tissues and organs
- Coralline Sponges
- calcium carbonated skeleton forms beneath the body
- Glass Sponges
- live anchored in deep water sediments
- Asexually
- buds and branches off and grow into seperate sponges
- Sexually
- ceus developed into gametes
- Approximentaly of al aniimals are Invertebrates
- 97%
- Porocytes
- allows water to enter the sponge
- Pinacocytes
- outer layer covered with flat cells
- Animals with backbone
- 3%
- Sessile
- attached to the bottom of the surface classified as PORIFERA
- Invertebrates
- no backbone
- 9,000
- almost all species are considered marine
- Largest Numbers of Sponges
- found in shallow water, tropical waters in a variety of shapes and sizes
- Boring Sponges
- dig channels through calcium carbonate
- Sponge
- simplest structual multi-cellular animal
- Choanocyte
- large feeding chamber
- Osculum
- the opening on top
- Spicules
- calcareous supporting structers
- Vertebrates
- backbone
- Encrusting Sponge
- form thin bright colored growths on rocks and dead corals