Abstract
During a year (in winter, spring, summer and autumn) the spirographic survey of one and the same group of healthy children (33 boys and 32 girls of primary school age, natives of the Arkhangelsk) was conducted. It has been detected that the increased utmost and reserve functional abilities of external respiration in children aged 8-9 years in the transition period from the warm season to the cold season (autumn) are observed. The increased minute pulmonary ventilation in the surveyed children is connected mostly with the increased respiratory volume rather than with respiration rate.
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