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Zoology Lecture Unit 3 > Phylum Hemichordata > Flashcards

Phylum Hemichordata Flashcards

1
Q

Phylum Hemichordata

Common name?

A

Acorn worms and Pterobranchs

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2
Q

Phylum Hemichordata

Germ layer

A

Triploblastic: coelomate

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3
Q

Phylum Hemichordata

Digestive tract?

A

Complete

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4
Q

Phylum Hemichordata

Respiratory structure?

A

Ciliated pharyngeal gill slits

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5
Q

Phylum Hemichordata

Feeding behavior?

A

Filter / Suspension feeding

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6
Q

Phylum Hemichordata

Excretory structures?

A

No specialized structures

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7
Q

Phylum Hemichordata

Skeleton type?

A

Hydrostatic skeleton

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8
Q

Phylum Hemichordata

Symmetry?

A

Bilateral symmetry

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9
Q

Phylum Hemichordata

Nervous system

A

Dorsal solid nerve cord

No ganglia

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10
Q

Phylum Hemichordata

Circulatory system?

A

Open circulatory system

1 or 2 contractile vessels

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11
Q

Phylum Hemichordata

What are the 3 body regions?

A

Proboscis
Collar
Trunk

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12
Q

Phylum Hemichordata

Acorn worm proboscis function?

A

Filter feeding

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13
Q

Phylum Hemichordata

Pterobranchs proboscis function?

A

Secretes a worm tube for protection

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14
Q

Phylum Hemichordata

Collar function?

A

Protect the mouth

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15
Q

Phylum Hemichordata

Trunk function?

A

Life’s processes

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16
Q

Phylum Hemichordata

Living environment?

A

Marine

17
Q

Phylum Hemichordata

Supergroup?

A

Deuterostomia

18
Q

Phylum Hemichordata
Class Enteropnuesta
Common name?

A

Acorn worms

19
Q

Phylum Hemichordata
Class Enteropnuesta
Circulatory system?

A

Open

2 pumping structures

20
Q

Phylum Hemichordata
Class Enteropnuesta
Dorsal pump structure pumps blood to?

A

Anterior circulation

21
Q

Phylum Hemichordata
Class Enteropnuesta
Ventral pump structure pumps blood to?

A

Posterior circulation

22
Q 
Phylum Hemichordata
Class Enteropnuesta
Monoecious/Dioecious?
Fertilization type?
Larvae motility?
A

Dioecious
External fertilization
Motile larvae

23
Q

Phylum Hemichordata
Class Pterobranchia
Common name?

A

Pterobranchs

24
Q

Phylum Hemichordata
Class Pterobranchia
Feeding behavior?

A

Filter-feeding via tentacles + cilia

25
Q

Phylum Hemichordata
Class Pterobranchia
Reproduction and fertilization types?

A

Sexual - external

Asexual - budding

26
Q

Phylum Hemichordata
Class Pterobranchia
Parental care?

A

Larvae stay in the worm tube

Zoology Lecture Unit 3 (9 decks)

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