annelids Flashcards
1
Q
what kind of coelom
A
coelomates
2
Q
what are septa
A
partitions that divide the coelom
3
Q
what kind of skeleton
A
hydrostatic
4
Q
how do they move
A
- circular muscles contract: segments thin and elongate
- longitudinal muscles contract: segments thick and shorten
5
Q
what kind of body plan
A
tube within a tube
6
Q
what digestive parts are specific to annelids?
A
crop, gizzard for grinding food
7
Q
what kind of circulatory system? describe
A
closed
- 5 hearts (earthworms)
- ventral and dorsal blood vessels
8
Q
nervous system?
A
- brain
- ventral nerve cord
- with ganglia
9
Q
excretory?
A
nephridium tubules
10
Q
which classes have cephalization?
A
clamworms and leeches
11
Q
what do clam and earth worms have for movement
A
setae: bristles
12
Q
how do they fertilize
A
lie next to each other, clitellum of one puts sperm in
13
Q
respiratory system?
A
diffusion through skin
14
Q
what appendages do clamworms have?
A
- parapodia: paddle-like. also for respiration
- tentacles
15
Q
how do clamworms feed?
A
- predators
- chitinous jaws
- some are sessile filter feeders
