This document summarizes key aspects of temperature, pulse, respiration, and blood pressure. It defines each vital sign, outlines normal ranges, and lists factors that can affect each measurement. Temperature is regulated by the hypothalamus and can be affected by hormones, activity level, and infection. Pulse is regulated by the autonomic nervous system and characteristics include rate, rhythm, and quality. Respiration is controlled by the medulla oblongata and carbon dioxide levels, and characteristics include rate, rhythm, and depth. Blood pressure is the force of blood against artery walls and is affected by age, stress, exercise, and medical conditions.