Question

from the outer margin of ring canal are given out five radial canal​

Answer 1

Answer:

Radial canal: From the outer surface the ring canal are given out 5 radial canals one to each arm upto its extremity through the ambulacral groove of the arm. Each runs passing above the radial nerve and terminating in the lumens of terminal tentacle.

Explanation:

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Answer 2

Answer:

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