How do pulse rates of infants and children differ from those of adults?

The pulse rates of infants and children are notably different from those of adults, reflecting the physiological development stages of individuals. Infants generally have higher pulse rates compared to children, which is due to their higher metabolic needs as they grow and develop rapidly. This higher demand for oxygen and nutrients necessitates a faster heart rate in infants.

As children grow, their pulse rates gradually decrease, and when compared with adults, children still have higher pulse rates but lower than those of infants. Adults typically have a resting heart rate that ranges from 60 to 100 beats per minute, while older children have pulse rates that can range from about 70 to 100 beats per minute, whereas infants can have pulse rates as high as 120 to 160 beats per minute at rest.

The correct option reflects this developmental change, capturing the relationship that infants have the highest pulse rates, followed by children, with adults having the lowest pulse rates of the three groups, thereby highlighting the variations in heart rate across different ages.