Fact 1: Mollusks have a circulatory system with one or two hearts that pump blood.

Fact 2: Interestingly, a squid is also a mollusk.

Given the two facts above, answer the question "Which animals have a circulatory system?" with the following options: 
- insects
 - mammals
 - fur seals
 - sharks
 - cows
 - squids
 - a fish
 - chickens


 

      squids   