The two upper parts of the heart that receive blood from the body are called the left and right

The right and left atrium recieve blood from the body into the heart.

Explanation:

The right atrium recives deoxygeneted blood from the body through the vena cava.

The blood flows into the right venrical which has got muscles that pump the blood into the lungs where oxygenation takes place.

The blood then leaves the lung and enters the heart through a pulmonary vein into the left atrium.

The two upper parts of the heart that receive blood from the body are called the left and right Atrium

Explanation:

The two upper chambers of the heart that receive blood through the ventricles in the body are called Atrium. The human heart is as big as your fist. It is divided into four ventricles: the left and right atria and the right and left ventricles. It is surrounded by a double-walled sac called pericardium.

The right auricle receives oxygen-deficient blood from the upper and lower veins. The left auricle piercing receives pulmonary veins containing high levels of oxygen. The atrium contract to draw blood into the ventricle.

well i’m not to well in health but if the body produces more standard fat then the fat will convert most of it into energy and give all the muscles nutrients (sorry if it was wrong