EARTHWORM DISSECTION

Crop

Stores food in earthworm

Gizzard

Grinds food in earthworm

Intestine

Runs length of body; absorbs nutrients from digested food

Septa

Wall that internally divides segments of the earthworm

Dorsal blood vessel

carries blood throughout the length of the earthworms body

Clitellum

Produces cocoon which egg and sperm fertilize in.

Pharynx

Structure which connects the mouth to the esophagus

Cerebral ganglia

Earthworm's primitive brain

Aortic arches

The heart-like pumping organs of earthworms.

Ventral nerve cord

sends nerve impulses to and from the brain

Anterior end

head end of the earthworm

Posterior end

tail end of the earthworm

ventral surface

belly side of the earthworm; light-colored

dorsal surface

back side of the earthworm; dark-colored

seminal receptacles

Recieves and stores sperms from another worm.

seminal vesicles

two small glands that secrete a fluid rich in sugar that nourishes and helps sperm move

how many hearts?

5 arches; 10 hearts

prostomium

upper lip which pushes food into mouth

digestive system