# Advice 1: How to determine the volume of the lungs

The volume of the lungs - often used, but not quite right definition. Correct – "the vital capacity of the lungs" or the abbreviation "VC". It represents the volume of air that can exhale people after the deepest possible breath and is measured in milliliters. Vital capacity of the lungs depends on many factors: age, sex, General health, degree of physical development, the employment in certain types of sports.
You will need
• - spirometer;
• - the balloon;
• - the pelvis;
• - wide plank;
• - measuring Cup.
Instruction
1
To determine the amount of light can be in a medical facility. To do this, doctors used a special device – the spirometer.
2
To measure vital capacity of lungs you will need a balloon, yarn or twine, a large container of water, a wide Board and some measuring utensils. For greater accuracy, it is better to have a graduated beaker. Place the container in the tub and fill with water to the brim.
3
Take the ball, smooth it between your hands, removing air. This is done for better accuracy of the experiment. However, given that the air in the ball quite a bit and the measurement error will be some fraction of a percent, this stage can be neglected.
4
Take a maximally deep breath, then firmly press the opening of the balloon to your lips and exhale to the limit. Loop the end of the balloon and tightly tie the string or twine.
5
Then place the inflated balloon on the surface of the containers with water standing in the tub, gently press the top plate and begin to press for as long as the plate does not lie on the edges of the tank, and the bulb will not be submerged. Try to keep it not twisted (that is why the Board needs to be wide).
6
Of course, some of the water out, because it replaced the air enclosed in the volume of your ball. Now your task is to determine how much water is poured. (By the way, a similar problem was solved long ago, the great scientist Archimedes to determine whether pure gold made crown of king Hiero).
7
Remove pressure plate, remove the ball from partially empty containers. Then using the graduated cylinder, filling it and pouring the water into the tank, determine what volume of water will need to it again reached the edges. This volume is equal to the vitality of the lungs.

# Advice 2 : What is the volume of the lungs is considered normal for an adult

People are aerobic, that is, the organisms of life which needs oxygen. Light - is paired organ, which is responsible for respiratory function. With their help it is gas exchange between inhaled air and blood.

## Normal "filling of the lungs with air"

A person commits 13 - 15 respiratory cycles at measured breathing (breaths in 1 minute) while breathing in and out in an average of half a liter of air. But during respiration in the lungs is delayed about two liters of air (residual volume). Man uses only a part of the total volume of their lungs, which can reach up to 4-6 liters, and this is even with the deep breathing.

## Is it possible to increase your lung capacity?

We all know that professional swimmers, especially the divers, how long can you hold your breath, this ability is very important, so they train a lot. This implies that you can "pump up" your lungs are like a muscle. And indeed it is. Scientists have proven that athletes, especially swimmers, the volume of the lungs more than the average person and this is achieved by heavy exercise.

## Why measure it YELLOW?

In medicine the volume of the lungs is characterized by several parameters with lung function, you need to define, but more important is YELLOW, it indicates the status of the respiratory system. VC is the maximum volume of air that is exhaled after a deep breath.

## How to measure the VC?

Spirography (removal of spirogramma) method to determine VC. The determination is carried out in the morning, on an empty stomach, after half an hour of rest also cancel drugs that affect respiratory function. The study is carried out in a vertical position. If the patient is already diagnosed with bronchial asthma, one followed by a second measurement on the same device, but after the medication used by the patient. This helps to assess the dynamics of disease development and to test the effectiveness of the treatment. Since this value depends on the individual characteristics of the person, use the estimated value JAL ("should" lung capacity, that is, takes into account parameters that are specific to the person - gender, height and weight). JAL is calculated by different formulas, e.g.:

- JAL (men)= 5,2×height (in meters) is 0.029×Age (years) — 3,2;

- JAL (female) = 4,9×height — 0,019×Weight — 3,76;

In studies, these values are compared. The increased deviation from the norm is not a pathology, especially if the person is actively involved in sports since due to the loads the energy required more, and as a result of oxygen, so work hard and lungs. But lowering the points about the problems of the respiratory system.
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