What does pulse describe?

The term "pulse" refers specifically to a rhythmic wave of blood that is felt in an artery as a result of the contractions of the heart. When the heart beats, it pumps blood into the arteries, creating pressure waves that can be detected at various pulse points in the body, such as the wrist or neck. This rhythmic sensation is a direct indicator of the heart rate and rhythm, which are critical components of cardiovascular health.

In contrast, the other options describe different physiological phenomena. The number of breaths taken in one minute pertains to the respiratory rate, not the pulse. The sound of the heart beating refers to heart sounds, which are detected through auscultation and relate to the opening and closing of heart valves. Finally, the pressure in the arteries during heartbeats is a measurement related to blood pressure, which is distinct from the pulse itself. Therefore, the correct description of pulse is the rhythmic wave of blood felt at an artery.