Aortic arches are absent in earth worm .
aortic arches is another term for heart, and an earthworm has 5.
There are 5 aortic arches, they are "hearts". They pump blood around the worm and help digestion.
The function of an earthworm's aortic arches are to pump blood to the ventral blood vessel and into the body.
They are responsible for holding up the aortic feet.
Blood
Is a right sided aortic arch normal?
It has aortic arches which are objects similar to hearts. There are four aortic arches in a single worm.
balls
left
it acts as a heart for an earthworm.... <3
Technically, they don't. There are five objects similar to hearts that are called aortic arches. I'm not positive all types of worms have these aortic arches but this is the most probable answer.