DO You Know?

13 June, 2019 12:00 AM printer

•    Human lungs are the organs responsible for respiration. Respiration is different than breathing. Breathing involves the act of inhaling oxygen and exhaling carbon dioxide. This is usually accomplished by the nose. Breathing, on the other hand, is a process of breaking down oxygen so that it can be used by body cells for creating energy. Thus, breathing is a part of respiration because without breathing, oxygen cannot enter our body. Thus, the job of our lungs is to process oxygen.

•    There are two lungs in human body – the right lung and the left lung. These two lungs together weigh 2.9 pounds of 1.3 kilograms. The left lung is lighter than the right lung.

•    The left lung has two lobes and is slightly smaller than the right lung. The right lung, on the other hand, has three lobes.

•    The structure of left lung differs slightly from the structure of right lung (apart from the difference in the number of lobes). The left lung contains a ‘cardiac notch’. The cardiac notch is a small place designed to accommodate the heart.

•    The total length of the airways running through the two lungs is 1,500 miles or 2,400 kilometers.

•    The two lungs together contain 300 to 500 million alveoli. What are alveoli? They are tiny and spongy air sacks which usually measure 10 micro meters. 

•    Scientists estimate that the total internal surface area of lungs in adult humans vary between 30-50 sq. meters and 70-10 sq. meters.