The correct answer is: Atrium.
The atria are the top chambers of the heart. They are two small, thin-walled chambers that receive blood from the body
and lungs. The right atrium receives deoxygenated blood from the body, while the left atrium receives oxygenated blood from the lungs.The atria are separated from the ventricles by the atrioventricular valves. The right atrioventricular valve (tricuspid valve) and the left atrioventricular valve (mitral valve) prevent blood from flowing back into the atria when the ventricles contract.
The atria contract and pump blood into the ventricles. The right ventricle pumps blood to the lungs, while the left ventricle pumps blood to the body.
The atria are important for maintaining a healthy heart. They help to ensure that blood is pumped efficiently throughout the body.
Aorta is the largest artery in the body. It carries oxygenated blood from the heart to the rest of the body.
Septum is a wall that separates two chambers of the heart. The interventricular septum separates the right and left ventricles. The interatrial septum separates the right and left atria.
Ventricle is the lower chamber of the heart. It pumps blood out of the heart to the rest of the body.