This lesson will give an overview of the major structures and functions associated with the Lower respiratory tract. It is 1 of 2 in the series titled "Lower Respiratory Tract: Structure and Function Overview."

How does breathing work? This interesting and entertaining animation gives you a brief summary of how the respiratory system works.

Watch this short movie to find out the basics of the respiratory system. Fun to watch and lots of good information. From KidsHealth.

When you breathe, you transport oxygen to the body's cells to keep them working, while also clearing your system of the carbon dioxide that this work generates. How do we accomplish this crucial and complex task without even thinking...

Learn more about photosynthesis and cellular respiration through a classic story: Jack and the Beanstalk. Rishi is a pediatric infectious disease physician and works at Khan Academy.

Take a glimpse into your lungs to understand what happens when you have an asthma attack. [4:40]

Follow the path of an oxygen molecule as it makes its way from your mouth down to an alveolus! This video explores teh bronchial tree. [12:46]

Find out how to calculate exactly how much oxygen is deep down inside your lungs with this video! Also understand the path air travels as it is brought into the body. [7:58]

Learn here about what happens to the lungs and the body during an athsma flare-up. [2:26]

The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm. [20:32]

Learn the mechanics of breathing, and how breathing air in is quite different from breathing air out. [12:04]

This video contains a very detailed drawing of the heart to explain blood flow. [9:47]

Find out the basics of tuberculosis (TB), where it comes from, its symptoms, and how it spreads. [12:26]

This video explains what happens in the lungs when you have an asthma attack and what factors can trigger it. [10:12]

Narrated animation showing how the lungs work to allow us to breathe and exchange oxygen for carbon dioxide. (Length: 1 min. 18 sec.)

Follow the path that oxygen takes as enters the body with this video. [1:30]

This video provides an explanation of a spirometer. A spirometer measures how well your lungs work to help doctors diagnose asthma and other breathing problems. [1:37]