human lungs with heart

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Human heart with vessels, lungs, bronchial tree and cut rib cage. X-ray Royalty Free Stock Photo

Illustration depicting human lungs, heart, and associated blood vessels. The lungs are Royalty Free Stock Photo

Pulmonary circulation. Anatomy of human lungs, heart and blood vessels Royalty Free Stock Photo

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Human Anatomy Diagram Lungs Heart Thyroid Glands Royalty Free Stock Photo

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The human lungs are the organs of respiration. Humans have two lungs, a right lung and a left lung. The right lung consists of three lobes while the left lung is slightly smaller consisting of only two lobes (the left lung has a cardiac notch allowing space for the heart within the chest). Together, the lungs contain approximately 2,400 kilometres (1,500 mi) of airways and 300 to 500 million alveoli.