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What part of the digestive system would you see in a cross-section anterior to the gizzard?
Mouth, Pharynx
What structure in the earthworm has a similar function as the human heart? Explain your answer.
Aortic Arches; they are the things that pump blood, like a heart.
What do two earthworms exchange during mating? Explain your answer.
They share sperm. Worms of both gender have sperm so when they are mating, they share sperm.
Describe the difference between a closed and an open circulatory system.
Open - blood not flowing in the vessels
Closed - blood flowing in the vessels (humans have closed)
Do earthworms have a front and a back end? Explain your answer.
Yes; earthworms eat from the front and give out waste from the end.
What characteristics distinguish an annelid from other worms?
Annelid does not have: obvious head end, antennae, appendages, segmented cylindrical body.
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