A spirometer is used in measuring the air capacity of the lungs.
It measures the air capacity of the lungs
Pulmonary function tests are used to diagnose respiratory disorder. Lung volume and lung capacities are measured. Normally the doctor will use an instrument called spirometer to measure various lung volumes. Some of the lung disorder a patient can have are: asthma, and Emphysema.
You measure your speed, endurance, and stamina.
The person breathes in oxygen and breaths out carbondioxide back into the spirometre. Because the carbondioxide can become a saftey hazard, soda lime is placed in the spirometre to remove the carbondioxide, however the volume of carbondioxide is equal to the volume of oxygen, as the oxygen is not being replace, so removing the carbondioxide removes the oxygen as well, making the spirometre drop.
The femur extends from the hip to the patella. So measure from your hip to the knee. The tibia extends from the patella to the ankle. So measure from the knee to the "ankle bone".
A spirometer is used to measure the amount of air in our lungs.
You would use a Spirometer.
An anapnograph is a variety of spirometer, a device used to measure the volume of air inspired and expired by the lungs.
Respiratory volume or respiratory minute volume is the volume of air which can be inhaled or exhaled from a person's lung in one minute.It is normally consider when a person on a ventilator for breathing problem due to sickness or injury. It is calculated by taking the tidal volume( or lung volume ) and multiplying it by the respiratory rate( the number of breaths per minute a person is taking).
A=Spirometer(Answered by Teshome Seya)*source-Tbar's medical dictionary.A spirometer is a device that measures the volume of air inhaled and exhaled by the lungs.A spirometer is used to measure breathing.Spirometerspirometeryou donta stethascope. 
No. A spirometer can be used to measure the volume of breath a person can expire but it is impossible to expire your entire lung capacity. This is due to the "dead space" capacity that remains to stop the collapse of the alveoli. As the alveoli are spherical and lined with mucus if they collapse it would be impossble for them to be filled again and so some air must remain within them. It is, however, possible to estimate someone's total lung capacity from the spirometer reading.
Because a nose peg will prevent any air from accidentally escaping through your nasal passages, assuring an accurate tidal volume and vital capacity result when you blow air out forcefully from your mouth into the spirometer.