Vital signs are measurements that indicate life, including heart rate, breathing rate, temperature, and blood pressure. They can be observed and monitored to assess a person's health status. Normal vital signs can vary by age, sex, weight, exercise, and other factors. Temperature is usually measured orally and normal temperature ranges are 98.6°F (37°C) orally and slightly higher in other areas. Blood pressure has a normal range of 120/80 and is measured using a sphygmomanometer and cuff on the upper arm. Respiration rate is counted by observing rises and falls of the chest and has a normal range between 12-20 breaths per minute.