What has a relatively complex circulatory system with a three-chambered heart?
sharks pan frogs Man Birds alpacas salmon a fish
A B C D E F G H
All frogs are amphibians.
frogs have a relatively complex circulatory system with a three-chambered heart
What has a relatively complex circulatory system with a three-chambered heart? (A) sharks (B) pan (C) frogs (D) Man (E) Birds (F) alpacas (G) salmon (H) a fish