Inflatable Lungs | Telugu |
Channel: Arvind Gupta
Date: 2015-01-22

Lungs are like 2, 3 ltr bags in side our bodies. And we can make a working model of the lungs with just a old plastic bottle and some balloons. You can see them inflating and deflating, breathing in and out. The Bottle is your chest , The Vertical of Y notch is the wind pipe, and two wings of Y are small wind pipes or bronchii.

Notice these lungs inflate and deflate only when we pull the balloon down. This balloon is diaphragm in our body. When the diaphragm muscles contract the diaphragm contracts and pushes up and deflates the lung. When muscles are relaxed diaphragm comes down and lungs get filled with oxygen.
So while lungs inflate and deflate the main driver is diaphragm.

To get energy our cells need to burn food. To burn food we need Oxygen.Lungs supply blood with oxygen and take away CO2 from the blood. This happens in side lungs where blood inside capillaries and air inside alveoli (very thin air pipes) come very close. Due to concentration difference of gases between air and blood. Oxygen moves from air to blood and CO2 from blood to air.

It is amazing that our lungs have 2400 km long alveoli and about 900 km of blood capillaries where the gas exchange takes place. The total surface area for the gas exchange is about 100 square meters. Imagine all this inside a 3 litre bag.
Enjoy this model of lungs and think about our three questions
. Why is our left lung smaller ?
. DIaphragm muscles are working when we inhale or exhale ?
. How is the gas exchange in our lungs affected when we breathe in air full of Carbon Dioxide ? This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org