Heart rate is the rate at which the heart beats per minute. It is a very important function of the human body. After doing exercise heart rate is elevated you need to gradually get it to normal.
The heart rate is the number of times the heartbeats per minute.
During training, the heart will speed up. The highest heart rate is varying which is relying on age.
The role of the heart is to accept blood that is oxygen deficient from veins and pump it to the lungs.Where it gathers up oxygen and gets freed of carbon dioxide.
The main function of blood is to pump the blood into different portions of the body.
learn more about the heart rate refer to the link ;
https://brainly.com/question/1155838
