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Zoology > Phylum Porifera > Flashcards

Phylum Porifera Flashcards

1
Q

Phylum Porifera

A

“The sponges”

Choanoflagellates and Sponges

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2
Q

Characteristics

A

Multicellular
Functional tissues
Lacks organ systems
Asymmetric
Filter Feeders

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3
Q

Important structures

A

Not all present in sponges

Spongocoel
Ostia & Osculum
Mesohyl
Spicules
Spongin

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4
Q

Spongocoel

A

Inner part

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5
Q

Ostia & Osculum

A

Inner and Outer openings

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6
Q

Mesohyl

A

jelly filling

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7
Q

Spicules

A

Rigid support

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8
Q

Spongin

A

Flexible support
(more common than spicules)

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9
Q

Ecology

A

Mostly marine

Mobile larvae and Sessile adults

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10
Q

Feeding and Digestion

A

Filter feedings
Choanocytes
Intracellular Digestion
Ostia -> Osculum

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11
Q

Choanocytes

A

Cells on inside beat in unison to draw things in or push things out of the sponge

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12
Q

Reproduction

A

Monoecious
Gemmules
Amoebocyte -> formation of egg

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13
Q

Monoecious

A

One individual has both reproductive potential
(Male and female organs)

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14
Q

Gemmules

A

Created during environmental stress

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15
Q

Four Classes

A

Hexactinellida
Calcarea
Demospongia
Sclerospongiae

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16
Q

Hexactinellida

A

Glass sponges
No spongin
Has silica

17
Q

Calcarea

A

Calcareous sponges
No spongin
Has calcium carbonate support system

18
Q

Demospongia

A

Demosponges
Has Spongin and Spicules
Most common of the four types

19
Q

Sclerospongiae

A

Coralline sponges
Layers of CaCO3 (Calcium carbonate)
Similar to tree rings

Zoology (21 decks)

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