Which organ is associated with the pericardial cavity?

The heart is directly associated with the pericardial cavity, which is a fluid-filled space surrounding the heart. This cavity is enclosed by a double-walled sac known as the pericardium, which protects the heart and provides a lubricated environment that allows for smooth movements as the heart beats. The pericardial fluid within this cavity reduces friction between the heart and surrounding structures, facilitating efficient cardiac function.

The other organs listed do not reside within the pericardial cavity. The liver is located in the right upper quadrant of the abdomen, the kidneys are positioned in the retroperitoneal space, and the lungs are found in the thoracic cavity but are not within the pericardial space. Each of these organs has its own specific anatomical relationships and spaces within the body that are distinct from the pericardial cavity dedicated to the heart.