EVERYDAY SCIENCE

Detailed explanation-1: -Segmentation can help the earthworm move. Each segment or section has muscles and bristles called setae. The bristles or setae help anchor and control the worm when moving through soil. The bristles hold a section of the worm firmly into the ground while the other part of the body protrudes forward.

Detailed explanation-2: -An earthworm moves using circular and longitudinal muscles, as well as bristles called setae. The earthworm can push the setae out of its body to grab the soil around it. To move forward, the worm uses its setae to anchor the front of its body and contracts the longitudinal muscles to shorten its body.

Detailed explanation-3: -Bristles, called setae, are located on each segment of the earthworm’s body. They prevent the earthworm from slipping backwards.

Detailed explanation-4: -Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin.

Detailed explanation-5: -Complete answer:-The locomotion in earthworm occurs due to the presence of the brush or bristle-like structures called Seta.-Along with Setae they use different longitudinal and circular muscles for their movement.