9.8.09-11 Measuring the frequency of breathing person.
Topics for study: Respiration rate. Measurement of pressure in the chest. Breathing at rest and after exercise.
Principle: Number of breaths per minute depends on many factors, such as lung capacity, athletic condition and level of fitness person. The purpose of the experiment is to measure and compare the rate of respiration before and after physical activity, the construction and interpretation of the relevant diagrams.
