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. The lungs together weigh approximately 1.3 kilograms (2.9 lb), and the right is heavier.
One bronchial tube leads to your left lung, the other to your right lung. For your lungs to perform their best, your airways need to be open when you inhale and when you exhale.
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. The lungs are soft, light, spongy, elastic organs that normally, after birth, always contain air./lungs-3a4755a7a1314751a3681b50b4b89e6e.jpg)
The left and right lungs are suspended by the lung root and separated by a mediastinum, a partition between the two. Each lung has three surfaces, named after their location in the thorax.