A) distributing vessel in first thirteen segments and collecting vessel in intestinal region
B) collecting vessel in first thirteen segments and distributing vessel in intestinal region:
C) distributing vessel
D) collecting vessel
Correct Answer: A
Solution :
The dorsal blood vessel is the largest and most prominent. It lies along the mid-dorsal line above the alimentary canal and extends throughout the length of body. It is distributing vessel in first 13th segment and collecting vessel in intestinal region.
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