What do the red muscles of tuna,the optical systems of billfish,and the legs of birds have in common?

Question

Quizplus · Accepted Answer

The red muscles of tuna, the optical systems of billfish, and the legs of birds all utilize countercurrent heat exchangers to efficiently manage heat. This system allows these animals to conserve or dissipate heat as needed, enhancing their physiological efficiency in their respective environments.

What Do the Red Muscles of Tuna,the Optical Systems of Billfish,and