Characteristic features of Annelida Flashcards

1
Q

Marine, freshwater or terrestrial

A

All of them

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2
Q

Bilateral- or radial symmetry

A

Bilateral

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3
Q

Metameric body or unsegmented

A

Metameric body

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4
Q

Coelom or no coelom

A

Coelom divided by septa

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5
Q

Coelom fluid functions as

A

hydrostatic skeleton

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6
Q

Digestive system

A

complete, not segmented

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7
Q

The cuticle is

A

moist

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8
Q

Nervous system

A

Double ventral nerve cord
Brain - a pair of dorsal cerebral ganglia

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9
Q

Sensory system

A

Tactile organs
Chemoreceptors
Photoreceptors

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10
Q

Sexes

A

Hermaphroditic or separate sexes

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11
Q

Asexual or sexual reproduction

A

Asexual

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12
Q

Excretory system

A

A pair of nephridia for each segment

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13
Q

Respiratory gas exchange via

A

skin, gills or parapodia

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14
Q

Open or closed circulatory system

A

Closed with muscular blood vessles and aortic arches

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