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Earthworms are invertebrates, which means they do not have a backbone. In fact, they don't have any kind of bones, legs, eyes, or teeth. They feel wet, slimy, and squishy.

While earthworms do not have legs, they do have muscles. They have muscles that circle their body and muscles that go from one end to the other.

The circular muscles allow the worm to make its body wider or more narrow.

The longitudinal muscles can shorten or lengthen the worm's body.

Using their muscles, earthworms crawl by lengthening its front part and pushing forward through the soil.

Notice how skinny the worm looks when its front end moves forward. Remember that the longitudinal muscles push the worm forward and the circular muscles squeeze the worm's body inward. Working together, these different muscles move part of the worm forward. When this is happening, tiny bristles called setaeon the underside of the worm hold the rear part of the worm in place.

Once the front part has pushed forward, the front setae hold the worm in place and the rear setae turn loose. Now the worm is in position to pull its rear end forward.

Notice how fat the rear end becomes as the worm's circular muscles relax and its longitudinal muscles contract. The rings of the earthworm expand and contract much like the coils of a slinky.

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Related Questions

How does an earthworm move without any legs at all?

Earthworm locomotion is conducted by waves of muscular contractions. The contracted segments seize the soil by the claw-like setae. The process of alternating the contracted segment with the relaxed segment causes movement.


How many legs dose a worm have?

For Your Infomation , Earthworm Do Not have ANY Leg


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No. It has legs and feet and muscles in its shoulders, upper legs and hocks that help it move it's legs and thus be mobile.


Are there any animals without legs?

Yes, Fish


How do jersey cows move?

They move around just like any cow does by using their legs.


How can I make my thighs and legs skinner without gaining any muscle?

You can make your thighs and legs skinner without gaining any muscle by running long distance


What would be the result if you shave your legs without using any cream?

Really irritated legs.


What animal on earth is born without any legs gets two legs when its young gets three legs when it gets old gets six legs when it gets very old and then dies without any legs?

A human :- when its young it has two legs; when its old it has 3 legs because of an additional walking stick.. when its realy old it has 6 legs because of the walking stick with four feet or a walking stand with four legs; then it dies without any legs becaue it loses control and energy of its leg.... :) riddle eh?


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yes it a unicorne


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What forced Nick to live without arms and legs?

Nothing forced him silly he was born without arms and legs if you look him up there is a picture of him at only six months old without any arms or legs and just that small'foot' he has on his left ...'leg'