Understanding Lung Function and Respiratory Health

Lung function refers to the capacity of the lungs to inhale, exhale, and transfer oxygen to the bloodstream for vital organ function.
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Respiratory Health | Pulmonology | Lung Function Tests | Lung Capacity
Prepared by Lee Cheng, reviewed by Dr. Helena Rodriguez

Lung Function FAQ


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What is a lung function test?

A lung function test looks at how well your lungs work. We look at common questions about the procedure including the main types of lung function tests and how quickly you will get the results. Why might I need a lung function test? Your doctor may have asked you to have one if you’ve been having breathing problems.

What is the function of the lungs?

The lungs are responsible for bringing in fresh air into the body. As you breathe in the diaphragm helps move air up into the lungs by tightening its muscles (relaxing pushes air out).

How do lungs work?

By taking in fresh air, the lungs are able to help oxygenate blood to be carried around your body. This is done by inhaling the air and bringing it in toward the pulmonary capillaries, which then become oxygen-filled cells that help with respiration. There are two lungs (a right and left) in the body, but they are different sizes.

What is a pulmonary function test?

Lung function tests, also known as pulmonary function tests, check how well the lungs work and can help investigate breathing problems. For example, tests can help screen and diagnose lung conditions such as asthma and COPD. They can also measure levels of function, monitor lung conditions, and see if treatments are working.

What is the function of lungs in a human body?

The human lungs are a pair of spongy organs within the thoracic cavity that facilitate gaseous exchange. They are a part of the respiratory system, which also includes the nose, nasal sinuses, mouth, pharynx, larynx, and trachea. At the level of the lungs, much-needed oxygen is absorbed into the blood, while waste gases are excreted and exhaled.

Why are the lungs important?

The lungs are a major organ that is part of the respiratory system, taking in fresh air and getting rid of old, stale air. This mechanism of breathing also helps to allow you to talk. By taking in fresh air, the lungs are able to help oxygenate blood to be carried around your body.

What is a lungs function test?

The most important lung function is to take oxygen from the environment and transfer it to the bloodstream. Lung function tests can show how well the lungs carry out this task. The lungs are the major organs of the respiratory system, which helps provide the body with a continuous supply of oxygen.

Lung Function References

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