Amphibians have a relatively complex circulatory system with a three-chambered heart.
Frogs, toads and salamanders are amphibians.
Frogs, toads and salamanders have a relatively complex circulatory system with a three-chambered heart.
What sort of circulatory system do frogs, toads, and salamanders share?
a) live birth
b) It helps them survive
c) matter vibrating
d) two-chambered heart
e) Veins and arteries.
f) biological diversity
g) three-chambered heart
h) four-chambered heart