Annelida

Question 1

Phylum Annelida body characteristics

Answer 1

tripoblastic, eucelomate, head in two parts:pro and peristomium, setae, complete digestive tract,

Question 2

Phylum Annelida classes (3)

Answer 2

Polychaeta, Oligochaeta, Hirudunea

Question 3

Distinct to polychaetes

Answer 3

parapodia with setae

Question 4

Annelid head

Answer 4

Prostomium and peristomium

Question 5

metameric structures

Answer 5

nephridium, septa, ganglion, muscles, celomic compartments, lateral blood vessel

Question 6

non metameric

Answer 6

crop, gizzard, ovaries/testes, aortic arch

Question 7

peristalsis

Answer 7

alternating waves of muscular contraction

longitudinal and circular muscles. (antagonistic muscles+coelomic cavities)

Question 8

longitudinal muscular contraction the setae

Answer 8

are retracted

Question 9

circular muscular contraction the setae

Answer 9

are extended

Question 10

coelomic fluid

Answer 10

acts as hydrostatic skeleton

Question 11

Lophotrochozoa lophophre phylum(2)

Answer 11

Phoronida-looks like polyp with feathers

Brachiopoda -like clam with feathers( valves look like shell)

Question 12

Oligocheate septa and celomic fluid

Answer 12

Oligochete septa are internal dividers of the coelom that isolate coelomic fluid within each segment or metamere. The septa act as complete partitions- coelomic fluid does not leak out of one segment into the next one.

Question 13

New Annelid worms

Answer 13

sedentaria and errantia