The aortic arches function as hearts, pumping blood through a closed circulatory system. Therefore, which of the following are true statements about how blood travels in an earthworm? 

Which of the following is/are true regarding the cardiac stomach? 

what is the name of structure F?

What is the name of the structure at B?

Which of the following reflects the correct order of appendages/structure from most anterior to most posterior? 

What is the name of the structure shown?

Sea stars, and all echinoderms have a(n) 

What is structure A in the circulatory system?

What is the morphology of this lichen?

What is structure B called?