Earthworm!

Which of the following is the fluid-filled space inside of each segment?

• coelom
• setae
• somite
• vessel

Which of the following is the worm's main sensory organ?

• prostomium 
• setae
• cuticle
• clitellum

Which of the following does NOT describe the Earthworm?

• annelid
• invertebrate
• mammal
• asexual

Which structure is located at the extreme posterior of the worm?

• anus
• mouth
• clitellum
• setae

Which of the following is responsible for stretching out the worms somites?

• circular muscle
• longitudinal muscle
• setae
• prostomium

Blood moves from the ventral blood vessel into the dorsal vessel by way of the __________. 

• parietal vessels
• aortic arches
• sub-intestinal vessels
• heart

Which vessel moves blood toward the anterior end of the worm?

• ventral vessel
• dorsal vessel
• aortic arches
• coelom

Which of the following is most superficial?

• cuticle
• epidermis
• circular muscle 
• longitudinal muscle

Which of the following is the most deep?

• epidermis
• cuticle
• circular muscle
• longitudinal muscle

Which structures are most anterior?

• male reproductive pores
• female reproductive pores
• seminal receptacle pores
• clitellum