Phylum Annelida Flashcards

1
Q

What is the phylum of segmented worms?

A

Annelida

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2
Q

Is the body segmented? and what is the form

A

Yes, body is segmented (metameric) and vermiform

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3
Q

What is the symmetry?

A

bilaterally symmetrical

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4
Q

What is the coelom like?

A

Well developed coelom

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5
Q

What is the skeleton?

A

coelomic fluid functions as hydrostatic skeleton

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6
Q

Does it have setae?

A

paired, epidermal setae often present

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7
Q

What is the circulatory system like?

A

closed circulatory system

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8
Q

What is the digestive system like?

A

complete digestive system

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9
Q

How does respiratory gas exchange work?

A

respiratory gas exchange through skin, gills, or parapodia

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10
Q

How is the excretory system?

A

excretory system with a pair of nephridia for each segment

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11
Q

What is the nervous system like?

A

Nervous system with a double ventral nerve cord with ganglia

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12
Q

What is the sensory system like?

A

tactile organs, taste buds, statocysts, photoreceptors, and eyes with lenses in some

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13
Q

What is the reproduction like?

A

Monoecious or dioecious with trochophore larva

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14
Q

What are the characteristics of the class Polychaeta?

A

mostly marine; head with yes on tentacles; parapodia bear numerous setae; monoecious or dioecious; development frequently involves a trochophore larval stage

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15
Q

What are the characteristics of the class Clitellata?

A

No parapodia; few or no setae; clitellum functions in cocoon formation; monoecious with direct development

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16
Q

What are the subclasses?

A

Oligochaeta and Hirudinea

17
Q

What are the characteristics of the SUBCLASS Oligochaeta?

A

few setae; no distinct head; primarily freshwater or Terrestrial. Earthworm

18
Q

What worm is in Oligochaeta?

A

Earthworm

19
Q

What are the characteristics of the SUBCLASS Hirudinea?

A

Bodies with 34 segments; posterior and usually anterior suckers present; setae rude or absent. Freshwater, marine, and terrestrial. Leeches

20
Q

What worm is in Hirudinea?

A

Leeches