Pathway of Blood Through the Heart
Every day, our hearts say, “I LUB you!” From the superior and inferior vena cava to the atria and ventricles, explore with us the blood flow order through our hearts in 14 easy steps. Come also learn with us the heart’s anatomy, including where deoxygenated and oxygenated blood flow, in the superior vena cava, inferior vena cava, atrium, ventricle, aorta, pulmonary arteries, pulmonary veins, and coronary arteries.
Quick & Easy Video on Blood Flow Pathway Through the Heart
Step by Step Animation Tutorial
To gain a visual step-by-step understanding, check out our quick and easy video on the blood flow pathway through the heart in less than 90 seconds. Please notice that blue represents deoxygenated blood, and red represents oxygenated blood.
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In summary from the video, in 14 steps, blood flows through the heart in the following order: 1) body –> 2) inferior/superior vena cava –> 3) right atrium –> 4) tricuspid valve –> 5) right ventricle –> 6) pulmonary arteries –> 7) lungs –> 8) pulmonary veins –> 9) left atrium –> 10) mitral or bicuspid valve –> 11) left ventricle –> 12) aortic valve –> 13) aorta –> 14) body.
Thank you to our member Emily for creating and submitting this ‘lub’-able animation to us!

Superior Vena Cava & Inferior Vena Cava
The vena cava is the largest vein in the body that delivers oxygen-poor or deoxygenated blood to the right atrium of the heart. The superior vena cava comes from the upper part of the body, including the brain and arms, while the inferior vena cava comes from the abdominal area and legs.
Vena Cava and Inferior Vena Cava, respectively?
Left Atrium & Right Atrium
The atria are the top two chambers of the heart that receive incoming blood from the body. The right atrium receives deoxygenated blood through the superior and inferior vena cavas from the body and pumps it to the right ventricle through the tricuspid valve, which opens to allow the blood flow through and closes to prevent blood backing up the atrium. The left atrium receives oxygenated blood through the pulmonary veins from the lungs. It pumps the blood through the mitral valve to the left ventricle. Attached to the atria are the pouches called auricles that expand to allow the atria to include more blood volume. For fetal circulation, there is a special hole shunt between the left atrium and right atrium called the foramen ovale that diverts blood away from the lungs and goes directly to the rest of the fetus’s body.

passing through the right atrium into the right ventricle?
Left Ventricle & Right Ventricle
The ventricles are the two lower chambers of the heart. The right ventricle receives oxygen-poor blood from the right atrium and pumps it through the pulmonic semilunar valve to the pulmonary artery and into the lungs to be filled with oxygen. On the other hand, the left ventricle receives oxygen-rich blood from the left atrium and pumps it through the aortic semilunar valve to the aorta to deliver the oxygen to the rest of the body.

Pulmonary Arteries & Pulmonary Veins
The pulmonary arteries deliver oxygen-poor blood from the right ventricle of the heart to the lungs, while the pulmonary veins deliver oxygen-rich blood from the lungs to the left atrium of the heart. For fetal circulation, there is a special hole shunt called the ductus arteriosus that is between the pulmonary arteries and aorta to divert blood away from the fetus’s lungs. Learn more about how the ductus arteriosus works here, and why it’s there for fetuses.
delivers blood from the heart to the lungs?
Aorta & Coronary Arteries
The aorta is the largest artery in the body that leads from the left ventricle of the heart to the rest of the body. It carries oxygen-rich blood to deliver to the body’s cells. As an artery, it contains thicker walls than veins because it has to withstand the tough pumping blood pressure of the heart.
The coronary arteries are a set of arteries that branch off the aorta and are located on the heart. They carry oxygenated blood and nutrients to nourish the heart tissue cells. When the coronary arteries are clogged by excessive fatty tissue in cholesterol, it can lead to a lack of nutrients and oxygen for the heart, whose cells begin to perish, and this leads to a heart attack.
blood?
Final Test Your Knowledge! 😀
blood flow order through the heart is correct?
–> Inferior/Superior Vena Cava –> Right Atrium –> Right Ventricle
–>Pulmonary Arteries –> Lungs –> Pulmonary Veins –> Left
Atrium –> Left Ventricle –> Aorta –> Body
Ventricle –> Pulmonary Arteries –> Lungs –> Pulmonary Veins –>
Right Atrium –> Right Ventricle –> Aorta –> Body
Arteries –> Lungs –> Pulmonary Veins –> Right Atrium –> Right
Ventricle –> Inferior/Superior Vena Cava –> Body
Ventricle –> Pulmonary Veins –> Lungs –> Pulmonary Arteries –>
Left Atrium –> Left Ventricle –> Aorta –> Body
Summary: What are the 14 steps of blood flow through the heart?
Blood flows through the heart in the following order: 1) body –> 2) inferior/superior vena cava –> 3) right atrium –> 4) tricuspid valve –> 5) right ventricle –> 6) pulmonary arteries –> 7) lungs –> 8) pulmonary veins –> 9) left atrium –> 10) mitral or bicuspid valve –> 11) left ventricle –> 12) aortic valve –> 13) aorta –> 14) body.
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Soo cute and educational!!
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Thanks so much! We’re glad that you enjoyed it. ❤
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This reminds me of the heart surgery I got five years ago -great stuff you do here on this site! Just showed this to my wife, and she loved the pick-up line in your article.
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Thank you Percy for sharing! Your comment warms our hearts. We’re glad that your wife enjoyed our pun-ny pick-up line. 😀 We wish you great health and happiness! Take care.
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Reblogged this on Peach6972's Re🤗Blog🥀.
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very interestig
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Thank you for reblogging, Peach! 😀
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anytime my friend,gdnite😍😍😍😍
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❤ Good night to you too, my friend Peach!
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thkz.my friend😇😍💕
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Nice article! This helps me understand the heart a lot better!
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Super, Grahm!! 😀
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I guess you could say that I “lub” it!
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😉
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Informative……. Nice work
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Thank you, Bird! We enjoyed your Life Science Facts and Telescope posts as well! Looking forward to more, happy holidays.
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Thanks a lot, Moosmosis…. Glad to know that you liked our posts. 😊
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Enjoyed them very much. They were informative and succinct! Thanks for sharing knowledge with us! 🙂
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😊
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Phenomenal content and post! Just donated to your website, a warm cup of coffee toast to you!
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Thank you so much for your support Mike!!!
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Thanks for posts like this! I’m a medical coder and find these so helpful for the work I do. Thanks!
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Thank you so much Sofia! You are so kind. We’re glad that our post helps! 🙂 Great blessings to you and your medical pursuits!
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Excellent article, I am going to reblog this one for you.
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Thank you so much, Oldpoet56! We appreciate your kindness!
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Reblogged this on Truth Troubles.
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I love it! ❤️ This is so creative 😍
I’m a cardiologist and showed this to my kids when they asked me about the heart’s parts 💕
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Wow, thank you so much Dr. Emma! It’s our pleasure. Thank you for your support. 💕💕
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I “lub” this article! 😘
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Excellent site and very helpful article.
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You’re very welcome, Chase. Glad to help!
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Fantastic article! This is so helpful thank you. Shared it with my friends!
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Thank you for sharing, Kate! Happy studying!
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😍
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❤ Thank you, Lily!
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Had questions on the 14 steps of heart blood flow and valve replacement on my exam, thanks for the article and review questions, they were really helpful! 😄
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Glad to help, Barry!
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Your heart article is pure gold ❤️Thanks!
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Thank you so much, Melanie! ❤ So glad you enjoyed it. Happy learning!
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This is a really easy to understand and well written article. Thanks for the practice questions on medicine too, here’s to acing tomorrow’s cardiology exam!
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Good luck, Mark! Thank you for your nice comment. 🙂
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Your summary on the 14 steps of heart blood flow is helpful thanks! And the rest of your site – an absolute gem!
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❤️❤️❤️❤️❤️ 5-star article on the 14 steps of blood flow through the heart!
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Thank you so much, Sammie! That means the world to us! We’re glad to help with the 14 steps of blood flow. Happy learning!
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Wonderfully written article on the blood flow steps of the heart.
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Thank you so much, Kevin!
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Really helpful article on heart blood flow! 😄
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Love this! ❤️ Your article made the 14 steps of blood flow to my heart. Sharing this with my study group!
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Thank you so much for sharing Annie! We’re glad that this has helped you learn the 14 blood flow steps. Good luck on your studies!
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You’re welcome and thanks again!
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Excellent article on the 14 steps of heart blood flow. I shared it with my class.
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Thank you so much, Mr. Matthews! This is very kind of you. We’re glad to help!
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