The upper chamber on the right side of the heart.
Caecilius is in the atrium.
If you mean not specifically, they are the veins.
atri is a medical term for atrium, upper heart chamber.
If you mean atrium, it is the right ventricle.
the size of the right atrium is smaller that the left atrium.
It means 'Metella is in the atrium/main room.'
right atrium
An atrium is a large open space within a building usually with a glass roof or part of the heart. I think you mean aviary. That you can call a big bird cage.
Atria is plural for Atrium. You have your (rt)Atrium and (lt)Atrium
well you have two atria the right atrium and left atrium but i think the right atrium has deoxygenated blood and the left atrium has oxygenated blood.
The two upper chambers are called the atria. A single atria is an atrium.
The cranial and caudal vena cava open in the right atrium.