Ch. 6: Sponges; Phylum Porifera Flashcards by Michaela Decoste | Brainscape

Q

Are sponges triploblastic or diploblastic?

A

Diploblastic

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Q

Simplest sponge type?

A

Asconoid

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Q

Medium-complexity sponge

A

Syconoid

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Q

Most complex sponge

A

Leuconoid

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Q

What is the innermost layer of the sponge?

A

Choanocytes

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Q

Choanocytes

A

has flagellum

Aid in digestion and reproduction

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Q

Archaeocytes

A

Aids in digestion and reproduction

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Q

Sclerocytes

A

Secrete spicules

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Q

Pinacocytes

A

T-shaped epithelial cells

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Q

Porocytes

A

Water flow regulation

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Q

Mesoglea

A

A matrix for cells

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Q

How do they perform asexual reproduction?

A

By fragmentation and budding
or
By Gemmula (seeds; archaeocytes)

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Q

How do they perform sexual reproduction?

A

They are hermaphrodites;

sperm derives from choanocytes
oocytes from archeaocytes

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Q

Class Calcarea

A

3-ray calcarean spicules

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Q

Class Hexactinellidae

A

Glassy sponges with 6-ray siliceous spicules

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Q

Class Demospongiae

A

Skeleton of siliceous spicules