The heart is an extraordinary structure that is the base of all human life. However, it similar to the uncomplicated functions of water pumps. As the heart beats, blood is distributed throughout the body using a network of blood vessels. The functions of the heart can be kept in regular and healthy conditions through exercise. Exercise has an effect on the blood that is circulating through the body. That circulating blood makes the heart desire more oxygen, causing the heart rate to increase rapidly to keep up with activity demand.
History of the Heart
The science and history of the heart can be traced back as far as the fourth century B.C. Greek philosopher, Aristotle, ...view middle of the document...
Throughout the next centuries, many philosophies were accepted and rejected to develop today’s approved heart anatomy.
Anatomy of the Heart
The heart is located beneath the rib cage, between the lungs, to the left of the sternum (breastbone). Most people believe that the heart is located on the left side of the chest because the bottom of the heart is tipped to the left. Therefore, you feel more of your heart on the left side. The heart is a powerhouse with muscular walls that contract, thrusting blood throughout the body’s blood vessels. The blood must flow in one direction in order for the heart to function properly. The three focal types of vessels are arteries, capillaries, and veins which form the circulatory system. These vessels, like elastic tubes, transport blood to every portion of the body. Arteries carry oxygen-rich blood away from the heart to all of the body’s tissues. They progressively become smaller as blood is carried further away from the heart. The capillaries are the small, thin blood vessels that connect the arteries to the veins. Nutrients, carbon dioxide and waste products are allowed to pass to and from the tissue cells by their thin walls. Veins, on the other hand, carry the oxygen-poor blood back to the heart. These vessels gradually become larger as they get near to the heart. The blood vessel system runs over 60,000 miles long.
Your heart rate, also known as pulse, is the number of times your heart beats or contracts per minute. Due to the variation of the effects on hearts, rate fluctuates from person to person. Common effects of heart rate are age, medication use, caffeine intake, activity level, and gender. However, other factors, such as air temperature, emotion, and body size are effective as well. When temperature increases, the heart begins to pump a little more blood, causing the rate to gradually escalate. Emotions, such as stress and anxiety, alter pulse. Obesity raises the normal resting point because the heart has to work harder to deliver blood to additional areas in the body. Caffeine is an energizing substance that utilizes an effect on the central nervous system which also increases the rate.
Knowing target heart rate can help determine degree of fitness so that over exertion is not taking place. Target heart rate...