Sponge Flashcards

1
Q

What is the phylum? and What is the meaning of it?

A

Porifera and Pore Bearing

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2
Q

What are the characteristics of Calcarea?

A

spicules made of calcium carbonate, radial symmetry, all marine, 3 body forms of Ascon, Sycon, and Leucon

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3
Q

What are the characteristics of Hexactinellida?

A

Six-rayed silica spicules, Glass sponge, Sycon & Leucon body forms

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4
Q

What are the characteristics of Demospongiae?

A

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

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5
Q

What are characteristics of the class, Homoscleromorpha?

A

spicules made of silica, small and simple or absent. LEUCON body form, easy anatomically & encrusting in form

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6
Q

What are the 4 classes of sponges?

A

Calcarea, Hexactinellida, Demospongiae, and Homoscleromorpha

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7
Q

The body has what?

A

Body with Ostia (pores), canals, and chambers that serve for passage of water. Water enters ostia and exits osculum

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8
Q

What is the environment of sponge?

A

All aquatic, mostly marine

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9
Q

What is the symmetry of sponge?

A

Mostly asymmetrical; some radial

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10
Q

What are the skeletal structures of sponges?

A

spicules (calcium carbonate or silica) or spongin or both

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11
Q

How does the internal structure work? (like digest, organs?, excretion)

A

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)

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12
Q

What type of feeders are sponges?

A

All adults are SESSILE filter feeders (attached)

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13
Q

Do sponges have a nervous system

A

No nervous system

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14
Q

How do sponges reproduce?

A

Asexual reproduction through budding, gemmules, and/or regeneration. Sexual reproduction by eggs and sperm; free-swimming ciliated larvae

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