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Which cavity is the heart located in?

The heart pumps blood from all parts of the body to the lungs where the blood is oxygenated. The heart and lungs are located in the chest cavity or thorax. 

The heart is positioned within the mediastinum and is enclosed by a protective sac called the pericardium. The location of the heart in the thoracic cavity and mediastinum is important for its function, as it allows the heart to receive and pump blood to the rest of the body.