Characteristic features of Annelida Flashcards
1
Q
Marine, freshwater or terrestrial
A
All of them
2
Q
Bilateral- or radial symmetry
A
Bilateral
3
Q
Metameric body or unsegmented
A
Metameric body
4
Q
Coelom or no coelom
A
Coelom divided by septa
5
Q
Coelom fluid functions as
A
hydrostatic skeleton
6
Q
Digestive system
A
complete, not segmented
7
Q
The cuticle is
A
moist
8
Q
Nervous system
A
Double ventral nerve cord
Brain - a pair of dorsal cerebral ganglia
9
Q
Sensory system
A
Tactile organs
Chemoreceptors
Photoreceptors
10
Q
Sexes
A
Hermaphroditic or separate sexes
11
Q
Asexual or sexual reproduction
A
Asexual
12
Q
Excretory system
A
A pair of nephridia for each segment
13
Q
Respiratory gas exchange via
A
skin, gills or parapodia
14
Q
Open or closed circulatory system
A
Closed with muscular blood vessles and aortic arches
