annelids

Question 1

what kind of coelom

Answer 1

coelomates

Question 2

what are septa

Answer 2

partitions that divide the coelom

Question 3

what kind of skeleton

Answer 3

hydrostatic

Question 4

how do they move

Answer 4

• circular muscles contract: segments thin and elongate
• longitudinal muscles contract: segments thick and shorten

Question 5

what kind of body plan

Answer 5

tube within a tube

Question 6

what digestive parts are specific to annelids?

Answer 6

crop, gizzard for grinding food

Question 7

what kind of circulatory system? describe

Answer 7

closed
- 5 hearts (earthworms)
- ventral and dorsal blood vessels

Question 8

nervous system?

Answer 8

• brain
• ventral nerve cord
• with ganglia

Question 9

excretory?

Answer 9

nephridium tubules

Question 10

which classes have cephalization?

Answer 10

clamworms and leeches

Question 11

what do clam and earth worms have for movement

Answer 11

setae: bristles

Question 12

how do they fertilize

Answer 12

lie next to each other, clitellum of one puts sperm in

Question 13

respiratory system?

Answer 13

diffusion through skin

Question 14

what appendages do clamworms have?

Answer 14

• parapodia: paddle-like. also for respiration
• tentacles

Question 15

how do clamworms feed?

Answer 15

• predators
• chitinous jaws
• some are sessile filter feeders

Question 16

how do earthworms feed?

Answer 16

scavengers

Question 17

how do leeches feed?

Answer 17

• 2 suckers
• fluid feeders: attach to open wounds
• saliva has hirudin: keeps blood flowing and prevents clotting

Question 18

are they hermaphroditic?

Answer 18

yes

Question 19

do clamworms have breeding seasons?

Answer 19

yes
- shed body with eggs / sperm

Question 20

do they self fertilize?

Answer 20

no