Question

In which blood vessel blood flows posterior end to anterior and

• A. Ventra blood vessel
• B. Dorsal blood vessel
• C. Sub neural blood vessel
• D. Lateral oesophagal vessels

Answer 1

The correct option is B Dorsal blood vessel

The dorsal blood vessels are responsible for carrying blood to the front of the earthworm’s body and the blood flows from posterior end to the anterior end. The ventral blood vessels are responsible for carrying blood to the back of the earthworm’s body and blood flows from the anterior end to posterior end in these vessels. The sub neural blood vessel carries blood from nephridia, body wall and reproductive organs to the dorsal blood vessel. The lateral oesophageal blood vessels are located one on each ventrolateral side of the gut in the first thirteen segments and blood flows from anterior to posterior end in these vessels.

So, the correct option is 'Dorsal blood vessel'