Question

why is the no. of breathe per min. change​

Answer 1

Answer:

A respiration rate under 12 or over 25 breaths per minute while resting is considered abnormal. Among the conditions that can change a normal respiratory rate are asthma, anxiety, pneumonia, congestive heart failure, lung disease, use of narcotics or drug overdose.

Answer 2

Explanation:

when you are in the rest then energy is not required to much then breathe rate becomes slow and when you are working some physical exercise then breathe rate is high means that the breath rate becomes slow and high per min.