yes they have muscles but no bones
"They (roundworms) lack circular muscles but have lengthwise muscles. As one muscle contracts, another muscle relaxes. This alternating contraction and relaxation of muscles causes roundworms to move in a thrashing fashion." Found in the Glencoe McGraw Hill "Biology: Dinamics of Life" textbook, pg. 711
diaphragm
an organ is a system that helps your bodily functions. a muscle helps you work and move.
an organ is a system that helps your bodily functions. a muscle helps you work and move.
it is the lower muscle of the eyeball. Helps move the eyeball.
muscle, Nerve, excretory, and reproductive organs
Biceps/triceps.
so that it helps the legs move better
Gingerceps
Roundworms are multicellular organisms that possess longitudinal muscles and a complete digestive tract, with a mouth and an anus. Their body plan is characterized by a single body cavity that houses their organs, including their nervous and reproductive systems.
deltoid, pectoralis, trapz
contractions like muscle