Question

In pheretima posthuma, the dorsal blood vessel is
1)Collecting vessel only
2)Distributing vessel only
3)distributing in the first 13 segments and collecting vessel in the intestinal region
4)Collecting in the first 13 segments and distributing vessel in the intestinal region​

Answer 1

Answer:

answer- distributing in the first 13 segments and collecting vessel in the intenstinal region.

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