I believe they are the right ventricle and left atrium. There are 4 chambers and I think these are the 2 lower chambers.
ventricle
The right and left ventricle
Ventricles.
ventricles
Osteichthyes, or bony fish, typically have a heart with two chambers: one atrium and one ventricle. This structure allows them to efficiently pump deoxygenated blood to the gills for oxygenation and then circulate oxygenated blood to the rest of the body. While most bony fish share this two-chambered heart design, some species may exhibit variations in their circulatory systems.
they are the ventricles
atrium
The lower heart chambers are ventricles. Atria are the upper chambers of the heart.
The atria are the two upper chambers in the heart, and they receive blood entering from outside of the heart. The ventricles are the two lower chambers of the heart and they each receive blood from an atrium and then send it out of the heart.
There are four chambers in the human heart. There are two atria (the two upper chambers) and two ventricles (the two lower chambers).
A ventricle is one of the two lower chambers in the human heart.
one lower chamber of the heart is known as ventricle, in human there are two ventricals ...while in frog there is only one ventricle.