92.Three chambered heart is found in: A. Birds and reptiles B. Amphibians and fishes C. Reptiles and mammals D. Amphibians and reptiles
Option D. Vertebrates have evolved a muscular heart to pump blood to body parts. Fishes have a two-chambered heart. Birds and mammals have four-chambered hearts, having two atria and two ventricles. Reptiles, except crocodile, have a three-chambered heart.
