What causes the pulse beat?

The pulse beat is caused by the rhythmic expansion and contraction of arteries as blood is pumped from the heart during each heartbeat. When the heart contracts (systole), it ejects blood into the arteries, causing them to stretch and create a pressure wave. This wave travels through the arterial system, and the sensation of this wave can be felt at various points on the body, such as the wrist or neck, as the pulse. The pulse rate can vary based on factors such as physical activity, stress, and overall cardiovascular health.