Mollusks have a circulatory system with one or two hearts that pump blood.
An abalone is a shellfish or mollusk.
Shellfish have a circulatory system with one or two hearts that pump blood.
shellfish have a circulatory system with one or two hearts that pump what

a: liquid
b: life
c: salt
d: food
e: matter
f: blood
g: oxygen
h: water