Multiple choice

Earthworms facilitate gas exchange through their

  1. Skin

  2. Eye

  3. Nose

  4. Mouth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earthworms respire through their moist skin, which allows oxygen to diffuse directly into their bloodstream and carbon dioxide to diffuse out. They lack lungs or specialized respiratory organs, so their thin, moist skin serves as the primary surface for gas exchange.

Keep practicing — related questions