Biology, 06.04.2020 16:30 caldonjoshhsms2061

While dissecting an earthworm, you notice a closed tube that sits atop the digestive tract. Within each segment, this dorsal tube has a pair of branches that extend to connect with a similar ventral tube. What are you looking at?
A) a closed circulatory system
B) a nerve cord
C) an excretory system
D) an open circulatory system

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While dissecting an earthworm, you notice a closed tube that sits atop the digestive tract. Within e...