Final answer:
The bristle-like structures that earthworms use to move are called chaetae. These chaetae are arranged within fleshy, flat, paired appendages on each segment of the earthworm called parapodia. The earthworms move by the waves of muscular contractions of the skeletal muscle of the body wall, in a process called peristalsis.
Step-by-step explanation:
The bristle-like structures that earthworms use to move are called chaetae. These chaetae are arranged within fleshy, flat, paired appendages on each segment of the earthworm called parapodia. The earthworms move by the waves of muscular contractions of the skeletal muscle of the body wall, in a process called peristalsis.