In your heart, the top two hollow sections are called atrium and the lower two are ventricles.
left atrium, left ventricle, right atrium, right ventricle.
The term for the 4 sections of the heart muscle is the cardiac muscle.
The Cartesian graph is divided into four sections called quadrants.
Each of the four sections are called quadrants.
quadrants
the four sections created by the coordinate axes
Left atrium Right atrium Left ventricle Right Ventricle
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Well, there are four chambers, left/right ventricle, left/right atrium. If you mean "sections" by "chambers" there are four of them.
The human heart is most often divided into 4 pieces called chambers 2 parts
quadrant
One of the four sections of a graph divided by the x and y axis is called a quadrant. There are four quadrants in total, numbered I, II, III, and IV, starting in the top-right and moving counter-clockwise.