It is called the clitellum. See link for more.
Earthworm
No. Like a flatworm it has no backbone, but it is round and not flat.
you get three piece of hair and wrap it round the middle bit of the hair then you do the same over again
clitellum-a bump that marks that the worm had mate before
Oh found out that the light bits the wet bit and darks dry, atleast for my trampoline.
Your kidding right? its the round thing in the middle. or its a senser and you roll you finger over the middle toward the front. still its silly that you can't figure that out.
Round Eyes in the Middle Kingdom was created in 1995.
precisly in the middle, the heart looks like three black sections from the outside. therefore three chambered
earthworm
do not get it In the middle :)
The reason that we say the earth is round is because it is close to being so, or at least is amost spherical. Because of its gravity, earth became round when it formed. And it remains round today, except that is has a bit of a "bulge" in the middle (at the equator) because it is spinning about its axis of rotation. (The term usually used is oblate spheroid.)
Earthworm does not have the back bone. Earthworm is invertebrate animal.