The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history.
5. In humans, the average
breathing, or respiratory rate,
mostly depends on age.
A newborn's normal breathing
rate is about 40 to 60 times
each minute and may slow to 30
to 40 times per minute
FACTS OF
RESPIRATION
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The average resting respiratory
rate for adults is 12 to 16
breaths per minute, and up to
40 to 60 breaths per minute
during exercise,