Multiple choice

Skin is an accessory organ of respiration in

  1. humans

  2. frog

  3. rabbit

  4. lizard

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

Frogs use their moist, highly vascularized skin as an accessory respiratory organ for gas exchange (cutaneous respiration), supplementing their lungs. Humans, rabbits, and lizards do not have skin adapted for significant respiratory function - their skin is primarily protective.