Understanding Heart Rate: The Cardiovascular System Explained

The cardiovascular system

The heart rate is the number of times the heart beats per minute. It is measured in beats per minute (bpm). The heart rate is controlled by the electrical system of the heart, which is located in the sinoatrial (SA) node. The SA node is located in the right atrium of the heart. The electrical impulses from the SA node travel through the heart, causing it to contract. The heart rate can be affected by many factors, including age, gender, fitness level, and stress.