Birds generate a lot of heat, especially during flight. Yet the adipose tissue under their skin and the feathers atop their skin make it difficult to eliminate excess heat across the skin. Which of the following can absorb body heat and eliminate it from the bird most effectively?
A) lymph in the lymphatic vessels
B) blood in the heart
C) blood in the vessels
D) urine in the bladder
E) air in the air sacs

Question

Quizplus · Accepted Answer

Air in the air sacs can absorb body heat and eliminate it effectively because birds have a unique respiratory system where air flowing in one direction through the lungs and air sacs allows for efficient exchange of heat and gas. This helps to regulate their body temperature during flight and other high-energy activities.

Birds Generate a Lot of Heat, Especially During Flight