If you arranged the following parts of the echinoderm water vascular system from outside to its termination in a tube foot,which structure would be encountered third?
A)stone canal
B)radial canal
C)ampulla
D)madreporite
E)ring canal

Question

Quizplus · Accepted Answer

The echinoderm water vascular system starts with the madreporite through which water enters, then flows through the stone canal, and then reaches the ring canal. The radial canal branches off from the ring canal to various parts of the body, including the ampulla, which connects the radial canal to the tube feet. Therefore, the structure encountered third would be the ring canal (choice E).

If You Arranged the Following Parts of the Echinoderm Water