The left ventricle receives oxygen-rich blood from the left atrium through the mitral valve and pumps it through the aortic valve out to the rest of the body.

The Left Ventricle

The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve.

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An organ that supplies oxygen and nutrients to the tissues and removes carbon dioxide and other wastes. It also pumps blood throughout the body via the circulatory system.

The Human Heart

The lungs are a pair of breathing organs located within the chest. They remove carbon dioxide from the bloodstream and bring oxygen into the bloodstream.

The Lungs

The Left Atrium

The right atrium pumps deoxygenated blood to the right ventricle and into the lungs.

The Right Atrium

Pneumonia is a condition in which the lungs fill with mucus. It is characterized by respiratory and systemic symptoms, including fever, congestion, cough, shortness of breath, and increasing aches and pains. Specific clinical signs observed during a physical examination include hypoxemia (a lower-than-normal level of oxygen in the blood), a crackling sound when breathing, the production of greenish sputum (mucus), and the appearance of a 'shadow' in the lung on a chest radiograph.

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