Lab 2

Question 1

metameres

Answer 1

segments of a Annelid body

Question 2

septa

Answer 2

partitions separating metameres

Question 3

annuli

Answer 3

trunk segments visible externally as rings

Question 4

chaetae

Answer 4

later external bristles

Question 5

homonomous

Answer 5

segments that are very much alike

Question 6

heteronomous

Answer 6

segments specialized with different functions

Question 7

annelids have how many vessels

Answer 7

2: one dorsal carries blood anteriorly and one ventral carries blood posteriorly

Question 8

coelom

Answer 8

fluid-filled body cavity

Question 9

peritoneum

Answer 9

lines the coelom

Question 10

hydrostatic skeleton

Answer 10

coelom acts as this; muscles also create this

Question 11

cuticle

Answer 11

outer most layer of the annelids

Question 12

epidermis

Answer 12

layer below the cuticle with scattered gland cells

Question 13

dermis

Answer 13

mostly composed of connective tissue

Question 14

circular and longitudinal muscles

Answer 14

below the dermis and controls movement of body

Question 15

prostomium

Answer 15

most anterior region of the annelid body

Question 16

pygidium

Answer 16

most posterior region of the annelid

Question 17

peristomium

Answer 17

first true segment

Question 18

notopodia

Answer 18

fleshy paired appendages that function in gills

Question 19

operculum

Answer 19

gill covering

Question 20

cirri

Answer 20

fleshy peristomial

Question 21

acicula

Answer 21

modified setae that act as skeletal support

Question 22

dioecious

Answer 22

separate sexes

Question 23

ocelli

Answer 23

eye-like structure in annelids

Question 24

neuropodium

Answer 24

parapodia the function as limbs

Question 25

Nereis sp.

Answer 25

polychaete worm

Question 26

Phragmatopoma californica

Answer 26

sand castle worm

Question 27

Lumbricus terrestris

Answer 27

earth worm

Question 28

clitellum

Answer 28

glandular swelling on Earth Worm where reprodution occurs

Question 29

circular muscles

Answer 29

contract and expand

Question 30

longitudinal muscles

Answer 30

reaches out to move, contracts to hold on

Question 31

Oblique muscles

Answer 31

one side contracted to turn that way

Question 32

nephridia

Answer 32

white filaments in earth worms on the inside used for excretion

Question 33

Family Tubificidae

Answer 33

blood worms

Question 34

Family Hirundinidae

Answer 34

leaches