Which group of animals has a closed circulatory system featuring a single circuit and two heart chambers?

tunicates

amphibians

fish

birds

mammals

Answer;

Fish

Explanation;Fish have a simple circulatory system, which consists of a two-chambered heart, blood, and blood vessels.The circulatory system of fish is a closed circulatory system, in which blood is always contained in a circuit of blood vessels.Fish have a single systemic circuit in which the heart pumps the blood to the gills to be re-oxygenated (gill circulation), after which the blood flows to the rest of the body and back to the heart.

The correct answer would be b

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask