Earthworm Study Guide

Question 1

Anterior

Answer 1

heart end

Question 2

Posterior

Answer 2

anus end

Question 3

Dorsal

Answer 3

back or top, darker in color

Question 4

Ventral

Answer 4

underside, lighter color

Question 5

Prostomium

Answer 5

the first segment for the worm, upper lip

Question 6

Mouth

Answer 6

anterior opening on worm for food intake

Question 7

Clitellum

Answer 7

large segment in middle of worm that secretes a mucus cocoon for the egg

Question 8

Anus

Answer 8

posterior opening on worm

Question 9

Pyarynx

Answer 9

muscular tube that produces suction to bring in dirt

Question 10

Esophagus

Answer 10

propels food from the pyarynx to the crop

Question 11

Crop

Answer 11

storage sac for food

Question 12

Gizzard

Answer 12

helps grind food into smaller pieces

Question 13

Intestines

Answer 13

secretes enzymes for chemical digestion AND place where nutrients are absorbed in to blood

Question 14

Aortic arches

Answer 14

(Hearts) plumbs blood
There are 5 hearts in the earthworm

Question 15

Dorsal blood vessel

Answer 15

transports blood to anterior end of body

Question 16

Ganglia

Answer 16

(Brain) sends and receives messages to/from the body

Question 17

Ventral nerve cord

Answer 17

relays messages between the cerebral gagloin (Brain) and body.