Question

Upper chambers of heart are called ________ while the lower chambers are called _________ .​

Answer 1

Explanation:

The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles.

Please Mark me as brainliest

Answer 2

Answer:

The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles. A wall of muscle called the septum separates the left and right atria and the left and right ventricles.

Explanation: