Fish have a circulatory system with a two-chambered heart.
Fish, such as tuna, is a high protein food.
Tuna have a circulatory system with a two-chambered heart.
What has a circulatory system with a two-chambered heart?
a) salmon
b) Man
c) Toyota
d) Birds
e) koalas
f) tuna
g) sharks
h) toads