no they have double loop circulatory system but the difference is that they have single ventricle.
YES.
A double circulatory system is also known as a double-loop circulatory system. This system contains two distinct pathways for blood to flow through the body. In most creatures, this consists of the loop between the lungs and heart, and the loop between the heart and body.
I think is because the circulatory system of a reptile has the ability to redirect deoxygenated blood from the lungs to save energy.
A circulatory system that involves the lungs is referred to as a double circulatory system. This is opposed to a single loop circulation that fishes have.
It's the simpler that exist in vertebrates that has gills as the site of gas exchange, wile other organism have a double loop circulatory system that have lungs instead of gills.
A fish does not have a double-loop circulatory system, but only a single circuit. Its 2-chambered heart consists of 1 atrium and 1 ventricle.
they have a single loop meaning the blood passes through the heart only once to go to everywhere in the body
Fish have closed-loop circulatory systems.
Tadpole has two chambered heart and a single-loop system while the adult has a three chambered heart and a double-loop system
closed circulatory system
Brown bear have a close circulation system