Test 3-Annelida

Question 1

Nearest Relatives

Answer 1

arthropod

Question 2

Relative complexity

Answer 2

Simple

Question 3

Importance to humans

Answer 3

food for animals/birds
enrich the soil enough to allow oxygen and water to enter it
leech therapy (inflammation) when the leech attaches to the affected area, they begin to suck the blood which will prevent blood clots from occurring (leech’s saliva)

Question 4

Life Cycle

Answer 4

reproduce only sexually
hermaphroditic (earthworms)
cross fertilize (can mate with other earthworms)

Question 5

Common representatives

Answer 5

earthworms, sandworms, leech

Question 6

Environment or habitat

Answer 6

terrestrial, aquatic, parasitic

Question 7

Muscles

Answer 7

radial and circular muscles

in two directions-circular and lenght

Question 8

Length

Answer 8

Microscopic to up to 9 feet in length

Question 9

Coelom

Answer 9

true body cavity

Question 10

Respiratory System

Answer 10

not a real one, skin is permeable

Question 11

Circulatory system

Answer 11

closed-when blood stays in a vessel

5 hearts

Question 12

Nervous system

Answer 12

no brain

Question 13

Setae

Answer 13

hair or bristles

Question 14

How they live

Answer 14

in groups

Question 15

Segments

Answer 15

grow one at a time, first to have true segmentation

Question 16

Symmetry

Answer 16

bilateral

Question 17

Marine worms

Answer 17

live in the water, respiratory system-gills

feather duster worms

Question 18

Earthworms

Answer 18

terrestrial mostly

Question 19

Leeches

Answer 19

freshwater

Question 20

Digestive System (earthworms)

Answer 20

crop-food storage
gizzard-grind food
eat everything that is in the soil

Question 21

Annel

Answer 21

little ring