Phylum Annelida

Front 1

List 5 characteristics that define Phylum Annelida (segmented worms).

Back 1

Bilaterally symmetrical and vermiform
Body has more than two cell layers, tissues and organs
Body cavity is a true coelom, often divided by internal septa
Body posses a through gut
They have a mouth and anus

Front 2

List 3 distinct features of Class Polycheata.

Back 2

Trocophore Larvae
Closed cardiovascular
Setae

Front 3

What type of larvae do Polychaetes have? What other groups of organisms have this?

Back 3

The other groups that have them are molluscs, annelids, echiurians,

Front 4

List the 4 different lifestyles of polychaetes.

Back 4

Burrower: Deposit feeders and predators.
Tube Dwelling: Tubes of mucus, protein, seaweed, shells
Symbiotic: Commensal
Free living- holoplankton

Front 5

Coelom:

Back 5

Cavity where the gut lies surrounded by different tissue, develops from mesoderm

Front 6

Longitudinal Muscles:

Back 6

Lengthen and shorten the segments

Front 7

Circular muscles

Back 7

Increase or reduce diameter

Front 8

Parapodia

Back 8

Flattened extensions

Front 9

Setae

Back 9

Stiff sometimes sharp bristles on parapodia

Front 10

Hydrostatic Skeleton:

Back 10

is a structure found in many cold-blooded organisms and soft-bodied animals consisting of a fluid-filled cavity, the coelom, surrounded by muscles