PATHOLOGY

Detailed explanation-1: -The heart has five surfaces: base (posterior), diaphragmatic (inferior), sternocostal (anterior), and left and right pulmonary surfaces. It also has several margins: right, left, superior, and inferior: The right margin is the small section of the right atrium that extends between the superior and inferior vena cava.

Detailed explanation-2: -The heart is divided into four chambers so that the mixing of the oxygen-rich blood and carbon dioxide-rich blood is prevented. They are known as atria and ventricles. The upper two chambers of the heart are known as atria, and the lower two chambers of the heart are known as ventricles.