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Humans have two lungs, a right lung and a left lung. They are situated within the thoracic cavity of the chest. The right lung is bigger than the left, and the left lung shares space in the chest with the heart.
Understanding the Context
The lungs together weigh approximately 1.3 kilograms (2.9 lb), and the right is heavier. Lung, in air-breathing vertebrates, either of the two large organs of respiration located in the chest cavity and responsible for adding oxygen to and removing carbon dioxide from the blood. A typical adult lung weighs about 2.2 pounds (1 kilogram) and is a little longer than 9 inches (about 24 centimeters) when you’re breathing normally. It’s about 10.5 inches (27 cm) when your lungs are completely expanded.
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Key Insights
Each lung receives air from a single, large primary bronchus. As the primary bronchi enter the lungs, they branch off into smaller secondary bronchi that carry air to each lobe of the lung. Your left lung is slightly smaller than your right lung, since your heart takes up some space on the left side. When you breathe in, air enters your airways and travels down into the air sacs, or alveoli, in your lungs. The right lung is larger than the left lung and has three lobes, while the left lung has two lobes.
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The lungs oxygenate blood by bringing in air through the trachea and into the alveoli. The lung itself gets its nutrient supply from the bronchial arteries which branch off the aorta. The lungs are the part of the body that make breathing (respiration) possible. Detailed overview of lung anatomy, including lobes, surfaces, bronchial tree, blood supply, nerve supply, lymphatic drainage, and clinical relevance.