earthworm dissection

 The brain attaches to the nerve cord. (T/F)

T

The dorsal side of the worm is lighter than the ventral side. (T/F)

F (dorsal side of the worm is darker than the ventral side)

 The clitellum is located toward the anterior end of the worm. (T/F)

T

 The esophagus lies after the pharynx (T/F)

T

Earthworms are hermaphrodites. (T/F)

T

The ventral nerve cord and the ventral blood vessel are connected. (T/F)

F

The white string-like structure running along the ventral side of the worm is the blood vessel. (T/F)

F

An earthworm has four aortic arches. (T/F)

F (has 5 aortic arches)

The dorsal blood vessel can be seen from the top of the worm. (T/F)

T

 Seminal vesicles are part of the worm’s digestive system. (T/F)

F

chronological order of digestive tract

mouth-> pharynx (인두)-> esophagus (식도)-> crop-> gizzard-> intestine-> anus

function of clitellum

 secreting mucus during reproduction to form cocoon for eggs

setae location and function

 located on the ventral side and it helps with movement and gripping in soil

softer one: the crop or the gizzard and function

crop is softer than gizzard and it stores food while gizzard grinds food and is hard

 List contents found in the digestive tract. What do worms eat?

soils and organic matters are found in the digestive tract and they eat soil and plants

How does the earthworm’s digestive system help it filter food out of the soil?

soil passes through digestive tract and the intestine takes in the nutrients while the wastes leave through anus

Describe two ways in which an earthworm’s body is adapted to life in the soil.

worm’s slimy body and setae help them move easily in soil and it dig holes in soil so that the soil can get air and water easily and worm’s waste acts as foods for plants-> these all make worm’s body being adaptive for soil 

Describe one way in which an earthworm is poorly adapted to life on land.

Worm’s skin needs moisture to breathe so it dies out easily on land-> this trait makes the worm poorly adapted to live on land