Their short bristles or hairs are a great aid to them as well as the peristalsis of their locomotion.
circular muscles
When the circular muscles contract, they make the worm skinnier. When the longitudinal muslces contract, they make the worm shorter. This series of movements allows for the worm to move forward.
In annelids, circular and longitudinal muscles work together to facilitate movement and locomotion. The circular muscles contract to elongate and narrow the body segment, while the longitudinal muscles contract to shorten and widen it. This coordinated action allows for both peristaltic movement, which helps the worm move through soil or water, and the ability to anchor parts of the body during burrowing or crawling. Together, these muscle layers enable efficient movement and adaptability in various environments.
circular muscleslongitudinal muscles
The circular muscle layer prevents food from traveling backward and the longitudinal layer shortens the tract. By Ah Mok
The circular muscles in the esophagus help with peristalsis, the wave-like contractions that push food downward. The longitudinal muscles aid in the stretching and shortening of the esophagus during swallowing. This dual muscle arrangement allows for efficient movement of food along the digestive tract.
The movement of earthworms is achieved through the contraction and expansion of their circular and longitudinal muscles along their body segments. They use their hydrostatic skeleton to push themselves forward by anchoring the front end of their body and lengthening the rear end. This movement allows them to burrow through the soil and navigate their environment efficiently.
Bones are not essential for locomotion . Earthworm move by using circular and longitudinal muscles along with setae and shoe accordion like locomotion .
Earthworm have narrow bands of circular muscle fibers around their bodies and longitudinal muscles that control the length of their bodies located inside the circular muscles. These two sets of muscles, which are attached to the bristle-like setae on the outside of the body, work together to change the length and thickness of the worm so it can move.
Circular and Longitudinal muscles.
Longitudinal muscles in annelids run along the length of the body and are responsible for elongating and shortening the body. Circular muscles encircle the body and are responsible for making the body thinner and longer. Together, these muscles work in coordination to help annelids move and burrow through different substrates.
The circular muscles contract and expand in co-ordination with the longitudinal muscle in series such as that if the posterior muscle are expanded and the anterior circular muscles are contracted the worm pushes and stretches its front end forward. The anterior muscles then expand to anchor its front end by use of the setae and the rear end is pulled forward. All this happens in a smooth and rhythmic motion.