Sponge Flashcards
What is the phylum? and What is the meaning of it?
Porifera and Pore Bearing
What are the characteristics of Calcarea?
spicules made of calcium carbonate, radial symmetry, all marine, 3 body forms of Ascon, Sycon, and Leucon
What are the characteristics of Hexactinellida?
Six-rayed silica spicules, Glass sponge, Sycon & Leucon body forms
What are the characteristics of Demospongiae?
Spicules made of silica or spongin, or both. All marine except one family, Spongillidae (freshwater that is found in ponds & streams), gets really big, ALL LEUCON body form, NO SPICULES
What are characteristics of the class, Homoscleromorpha?
spicules made of silica, small and simple or absent. LEUCON body form, easy anatomically & encrusting in form
What are the 4 classes of sponges?
Calcarea, Hexactinellida, Demospongiae, and Homoscleromorpha
The body has what?
Body with Ostia (pores), canals, and chambers that serve for passage of water. Water enters ostia and exits osculum
What is the environment of sponge?
All aquatic, mostly marine
What is the symmetry of sponge?
Mostly asymmetrical; some radial
What are the skeletal structures of sponges?
spicules (calcium carbonate or silica) or spongin or both
How does the internal structure work? (like digest, organs?, excretion)
Epithelial tissues present; no organs; digestion intracellular (digest in cell); excretion and respiration by diffusion (molecules of a substance move from an area where they’re highly concentrated to an area where they’re less concentrated)
What type of feeders are sponges?
All adults are SESSILE filter feeders (attached)
Do sponges have a nervous system
No nervous system
How do sponges reproduce?
Asexual reproduction through budding, gemmules, and/or regeneration. Sexual reproduction by eggs and sperm; free-swimming ciliated larvae
