Respiratory rate is the number of breaths a person takes in one minute. It is an important vital sign that helps assess a person's overall health. A normal respiratory rate for adults typically ranges from 12 to 20 breaths per minute, while children may have higher rates. Measuring respiratory rate can provide insights into a person's lung function and cardiovascular health. Factors such as exercise, stress, and illness can influence this rate. Monitoring changes in respiratory rate can help detect potential health issues early on.