Question

How many aortic arches does the worm have?
a) One
b) Two
c) Five
d) None

Answer 1

The worm has five aortic arches that help in the circulation of blood.

Step-by-step explanation:

The worm has five aortic arches. Aortic arches are simple pump-like structures in the circulatory system of worms that help in the circulation of blood. They are connected to the dorsal blood vessel and help in pushing the blood forward. The worm's circulatory system is relatively simple compared to more complex animals, but the five aortic arches ensure efficient circulation throughout the body.