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Zoology > Echinoderms > Flashcards

Echinoderms Flashcards

1
Q

What does the phylum echinodermata mean?

A

Spiny skin

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2
Q

List the animals in the phylum Echinodermata

A

Sea stars, brittle stars, sand dollars, sea cucumbers

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3
Q

When did echinoderms evolve?

A

500 million years ago

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4
Q

List the five classes of echinoderms

A

Crinoidia, Asteroidea, Ophiuroidea, Echinoidea, Holothuroidea

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5
Q

List five parts of the starfish body plan

A

Oral surface, Aboral surface, Endoskeleton, Protective spines, Pedicellariae

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6
Q

Distinguish between oral and Aboral surfaces on a starfish

A

Oral: ventral, Aboral: Dorsal

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7
Q

What are defensive organs on starfish and urchins called?

A

Pedicellariae

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8
Q

List all the parts of the water vascular system

A

Water, sieve plate, stone canal, ring canal, radial canal, lateral canal, ampulla, tube feet.

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9
Q

Explain how external digestion takes place with a starfish

A

When clam shell opens a bit, the starfish inverts it’s stomach and puts it inside the clam’s shell. (Cardiac stomach) Draws stomach containing partially digested food back into body to complete digestion (pyloric stomach)

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10
Q

How does a starfish get its oxygen?

A

Skin gills

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11
Q

What branches down each arm of a starfish?

A

Nerve Ring

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12
Q

What is the larval stage of a starfish called?

A

Bipinaria

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13
Q

How do starfish reproduce?

A

External fertilization, asexual reproduction (regeneration)

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14
Q

List 3 subphyla of the phylum Chordata

A

Verbrata, Cephalochordata, Urochordata

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15
Q

List characteristics of the phylum Cephalochordata

A

Free living, filter feeders, retain notochord, lancelets

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16
Q

What is an aquatic blade shaped animal called?

A

Lancelets

17
Q

List characteristics of the phylum Urochordata

A

Tunicates, sessile, filter feeders, incurrent siphon, cilia

18
Q

What are 5 major characteristics of the class enchinodermata?

A

Endoskeleton, water vascular system, tube feet, no cephalization, nervous system w/ no head or brain

19
Q

What are small movable extensions of the water vascular system?

A

Tube feet

20
Q

What are calcium carbonate plates that make up the Endoskeleton?

A

Ossicles

Zoology (6 decks)

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