Blood pressure is the force of blood against the walls of the arteries as the heart pumps it around the body. It is typically measured in millimeters of mercury (mmHg) and is represented as two values: systolic pressure over diastolic pressure. The systolic pressure is the higher value and represents the pressure in the arteries when the heart contracts or beats, while the diastolic pressure is the lower value and represents the pressure when the heart is at rest between beats. Normal blood pressure for adults is generally considered to be around 120/80 mmHg. However, blood pressure can vary based on factors such as age, gender, genetics, lifestyle, and underlying health conditions.