"Measuring Our Lung Capacity" PPT

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Hunan Education Edition fifth grade science volume 1, measuring our lung capacity PPT

Part I: The relationship between vital capacity and the respiratory function of the lungs

The relationship between vital capacity and lung respiratory function

Vital capacity can reflect the potential ability of respiratory function in a certain sense. When a person's lung capacity is small, in order to increase the amount of gas inhaled and exhaled, the only way to achieve the goal is to speed up breathing, that is, increase the number of breaths. Long-term accelerated breathing will eventually cause respiratory muscle fatigue. Breathing cannot maintain such a frequency and can only be slowed down, but it cannot meet the needs. The result is slow breathing, insufficient gas exchange, lack of oxygen in the body, and excessive carbon dioxide. On the contrary, the greater the vital capacity, the better the respiratory function of the lungs.

Measuring our lung capacity PPT, part 2: What should we pay attention to when measuring lung capacity?

What should you pay attention to when measuring lung capacity?

1. Do not exhale too hard to prevent air leakage.

2. No second inhalation is allowed.

3. The mouth of the spirometer should be strictly disinfected.

4. When inhaling and exhaling to the maximum extent, you can do whatever you want. For example, you can tighten your abdomen and bend over when exhaling.

5. Pay attention to the time interval (15 minutes) when repeating the measurement.

method one:

1. Experimental materials: balloons, measuring beakers, small buckets, and pens.

2. The measurer takes a deep breath and then exhales deeply into the balloon, and then tightens the mouth of the balloon.

3. Press all the balloons into the water, use a pen to draw the rising boundary of the water surface, and then use the principles of physics to measure the volume of water occupied by the balloon, which is the vital capacity of the subject.

Method Two:

Lung capacity is reflected by measuring the difference in chest circumference. First, ask the subject to inhale as deeply as possible and record the chest circumference length at the end of the inhalation. Then ask the subject to exhale as deeply as possible and record the chest circumference length at the end of the exhalation. Calculate the difference between the two bust lengths. Measure three times (should be measured at the same location), record and calculate the average. This method can only generally reflect the size of the lung capacity, and its accuracy is relatively poor. Because the contraction of the diaphragm and abdominal muscles during exhalation cannot be reflected in the chest circumference.

Measuring our lung capacity PPT, Part 3: How to use breathing exercises to improve lung capacity

How to use breathing exercises to increase lung capacity

1. Deep breathing method: Inhale slowly through the nostrils, slowly bulge the abdomen, and enlarge the chest. This process usually takes 5 seconds. When the lungs have absorbed enough air, hold your breath for more than 5 seconds, and then slowly exhale. The chest becomes smaller, and when the abdomen shrinks to the minimum, pause for 1-2 seconds, then start from the beginning, and repeat for 10 minutes.

2. Quiet breathing method: Press the right nostril with the thumb of your right hand, and slowly breathe deeply through the left nostril. When the lungs are saturated with air, press the left nostril with the index finger and middle finger of the right hand, hold the breath for 10 seconds, exhale, and then press Start over with the left nostril in place, and do 5 times on each side.

3. Sleep breathing: Lie on the bed, place your hands flat on your sides, close your eyes and start taking deep breaths. Slowly raise your arms above your head, close to your ears, and touch the head of the bed with your fingers. This process takes about 10 seconds, with both arms restored at the same time, repeated 10 times.

4. Exercise breathing method: Actively increase your breathing volume while walking or jogging, inhale slowly and exhale quickly. When inhaling slowly, slowly expand the chest as you inhale, and exhale quickly. Each exercise should not be less than 20 times, and can be performed several times a day.

5. Do more chest expansion exercises and exercise chest muscles, which will help increase the maximum inhalation volume.

Keywords: Hunan Education Edition fifth grade science PPT courseware free download, measuring our vital capacity PPT download, .PPT format;

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Update Time: 2024-09-15

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