ANATOMY

Detailed explanation-1: -The upper chambers of the heart are called atria which always receive blood. The lower two chambers are called ventricles which pump the blood out of the heart to various parts of the body.

Detailed explanation-2: -A typical heart has two upper and two lower chambers. The upper chambers-the right and left atria-receive incoming blood. The lower chambers-the right and left ventricles-pump blood out of your heart.

Detailed explanation-3: -Your heart has 4 chambers. 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.

Detailed explanation-4: -The upper two chambers are called atria (singular: atrium) and the lower two are known as ventricles (singular: ventricle).

Detailed explanation-5: -The upper two chambers are called the atria and the lower chambers are called the ventricles.