Why is the respiratory rate of children faster than that of adults?

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Why is a child's respiratory rate faster than an adult's?
Breathing 2008-07-31 I want to comment I want to ask Enter the parenting forum
The purpose of breathing is to expel carbon dioxide and inhale fresh oxygen, ensuring the normal functioning of the body's metabolic activities.
Meticulous parents may notice that a child's respiratory rate (frequency) is faster than an adult's. Why is this? Normal children have different respiratory frequencies at different age groups. The younger the age, the faster the respiratory rate. The normal respiratory rates for children at different ages are as follows:
Premature infants: 50 times per minute; Full-term newborns: 40 times per minute; Infants: 30 times per minute; Young children aged 1-3: 24 times per minute; 4-7 years old: 22 times; 8-14 years old: 20 times per minute; Adults: 8-20 times per minute.
A child's faster respiratory rate is determined by the anatomical and physiological characteristics of the respiratory system. A child's lung capacity is small, and the lung capacity per body surface area is 6 times smaller than that of an adult. The tidal volume (the amount inhaled and exhaled with each quiet breath) is also smaller, accounting for only 40%-50% of an adult's. However, the metabolic level and oxygen demand are relatively higher. Per body surface area, a child's energy metabolism is 1.6 times that of an adult.