Question

Locomotion in earthworm is helped by

• A. Setae
• B. Coelomic fluid
• C. Body wall musculature
• D. All of the above

Answer 1

The correct option is D All of the above

Each segment or section has muscles and bristles called setae. Setae help anchor and control the worm when moving through soil. The pressure in the coelomic fluid is distributed uniformly, and when the circular muscles of the body wall contract the body becomes extended with a force proportional to the pressure and to the cross-sectional area in the region of the body helping in locomotion. Thus the correct answer is option D.