Annelids

Question 1

serially segmented/metamerism

Answer 1

body composed of repeated similar segments

Question 2

Coelom

Answer 2

second body cavity that surrounds and is completely separate from the digestive cavity

Question 3

Hydrostatic skeleton

Answer 3

fluid filled coelom is divided into a series of compartments against which the circular and longitudinal muscles of the worm can act.
Contraction of circular muscles= elongate
contraction of longitudinal muscles= shorten

Question 4

Setae

Answer 4

Each segment, except the first and last, have tiny bristle-like structures called setae. These structures help the earthworm to move and act to sense the environment.

Question 5

Parapodia

Answer 5

little fleshy projections (legs) that have setae on them. They also function as gills for respiration underwater

Question 6

Clam worm eating

Answer 6

When feeding, the clam worm extends its proboscis, which contains hook-like jaws to
grasp its prey, and then retracts the proboscis to draw the food into its mouth.

Question 7

earth worm eating

Answer 7

Earthworms eat by pulling food into their mouth with their prostomium combined with the muscular pharynx which creates a very high suction (like a vacuum).