It is protected by your ribs and breastbone sternum. It beats about , times a day. Each beat of your heart pumps blood through a network of arteries and veins. The heart pumping Blood delivers essential oxygen and nutrients to every cell. Blood takes away waste products and carbon dioxide.
Arteries carry oxygen-rich blood from the heart throughout the body. Veins carry oxygen-poor blood back to your heart and lungs to start the cycle over again. Anatomy of the heart Your heart is divided into four sections or chambers. A muscular wall called the septum separates the right side of the heart from the left. Aortic valve Tricuspid valve Pulmonary valve Mitral valve These one-way valves keep the blood flowing in one direction through the different chambers of the heart and out to the body.
How your heart works To pump blood throughout the body, your heart contracts then relaxes. How blood flows through the heart The right atrium is full of oxygen-poor blood from your body muscles, organs, brain and heart. When the right atrium becomes full, it contracts. When the atrium contracts, the tricuspid valve between the right atrium and the right ventricle opens. The blood flows into the right ventricle.
When the right ventricle is full it contracts and pumps the blood to the lungs through the pulmonary valve In the lungs, carbon dioxide is removed and fresh oxygen is added to the blood.
The blood is now oxygen-rich. Oxygen-rich blood then flows into the left atrium. When the left atrium contracts, the mitral valve between the left atrium and left ventricle opens. The blood flows into the left ventricle. The left ventricle pumps the oxygen-rich blood into the aorta through the aortic valve and out to the rest of your body.
The oxygen-rich blood travels throughout your body. Veins carry the oxygen-poor body back to the right atrium. The right atrium fills with oxygen-poor blood. What a muscle! If you're an athlete in exceptional physical shape, your resting heart rate may be much lower.
Some professional athletes have resting heart rates of only 40 beats per minute. To check your pulse rate, find your pulse and count the number of beats in 15 seconds. Then multiply that number by four to calculate your pulse in beats per minute. You can't beat today's Wonder of the Day!
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There are more than 1, Wonders of the Day! We hope you liked this Wonder. We encourage you to reread it and pay close attention to the second to last paragraph! Thanks so much for sharing what you learned, Jordan! Hello there, Room ! Although working out for the entire day is not advised it could be too hard on your body! Generally heart rates don't decrease as you get older, unless you are taking a medication that impacts your heart beat. Staying physically active keeps your heart muscle in better shape and results in a lower heart rate.
To get an estimated number of heart beats in 10 years, let's use an average of 80 bpm. Thanks for all the great questions! We are undergoing some spring clearing site maintenance and need to temporarily disable the commenting feature.
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Follow Twitter Instagram Facebook. How many times does your heart beat in a lifetime? How big is your heart? What is the average resting heart rate for an adult? Tags: See All Tags anatomy , beat , biology , blood , cardiovascular , circulatory system , health , heart , Human Body , Math , muscle , nutrients , oxygen , pulse , science. Wonder What's Next? Find a few friends or family members to help you check out the following activities: Have you ever seen the heart beating in all its glory?
Probably not! Since your heart is inside your chest, it's not easily visible. Jump online and check out Blood Flow Through the Human Heart to see an animation of how the heart works!
Want to keep your heart beating for a long time to come? One way to keep your heart in good shape is to eat heart-healthy foods. To ensure an adequate blood supply to your whole body the four chambers of your heart have to pump regularly and in sequence. There are some conditions which can lead to damage to your heart muscle, making it weak and unable to pump as efficiently as before.
When this happens it is referred to as heart failure because of the failure of your heart to work efficiently.
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