Phylum Annelida

Question 1

what groups comprise annelida?

Answer 1

segmented worms

• earthworms
• leeches
• clamworms

Question 2

characteristics of annelids?

Answer 2

• terrestrial and aquatic
• coelomates
• triploblastic
• hydrostatic skeleton
• hermaphrodites

Question 3

scientific name for earthworm

Answer 3

oligochaeta

Question 4

scientific name for leech

Answer 4

hirudinea

Question 5

scientific name for clamworm

Answer 5

polychaeta

Question 6

nervous system of annelids

Answer 6

• well developed central nervous system
• ventral nerve cord
• simple brain

Question 7

what are parapodia and chaetae?

Answer 7

help with traction during movement (some groups have this, polychaeta)
-lateral extensions (parapodia) with bristles (chaetae)

Question 8

what is the clitellum? (on earthworms)

Answer 8

secretes mucous that holds 2 worms together during mating and produces a cocoon

Question 9

what are chaetae?

Answer 9

short bristles

Question 10

what are nephridiopores?

Answer 10

tiny pores (allow nephridia to excrete nitrogenous waste)

Question 11

what are septa?

Answer 11

thin partitions between each segment