Question

what are the hearts upper chambers called

Answer 1

The upper chamber is called an atrium (or auricle), and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart; the more muscular ventricles pump the blood out of the heart.

Answer 2

Hello!

The upper chambers of the heart are known as the left and right atria.

The lower chambers are the ventricles.

I hope this helps you!