What are the organs of circulation of a goldfish?

The organs of circulation in a goldfish primarily include the heart, which is a two-chambered structure consisting of one atrium and one ventricle. Blood circulates through a single-loop system, where it is pumped from the heart to the gills for oxygenation and then distributed to the rest of the body. Additionally, blood vessels, including arteries and veins, facilitate the transport of oxygenated and deoxygenated blood throughout the goldfish's body. The gills also play a crucial role in gas exchange, essential for the fish's respiration and overall circulation.