Multiple choice

Which of the following is the sole mode of respiration in earthworms?

  1. Tracheal

  2. Avian

  3. Cell surface gaseous exchange

  4. Cutaneous

  5. Bronchial

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is the only mode of respiration in earthworms. In cutaneous respiration, the skin is thin, moist and vascular. It acts as a respiratory surface.