We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is Involved in Blood Circulation?

By Jennifer Long
Updated May 17, 2024
Our promise to you
WiseGEEK is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WiseGEEK, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

The process of blood circulation occurs in the circulatory system. Blood must travel throughout the body to provide cells, tissues, and organs with nutrients and oxygen. Circulating blood also must assist in the removal of waste products. Blood circulation is necessary to sustain life.

Blood circulation is maintained within the circulatory system. Veins, arteries, and other vessels provide a network of tubes for blood to travel all over the body. Circulation begins with the heart pumping blood into these vessels. The blood travels in one circular direction through the body and flows back into the heart.

Arteries are large vessels that carry the blood to and from the heart. The left ventricle sends blood to an artery called the aorta. It is the largest artery in the human body. Blood circulation continues from the aorta to smaller arterial branches. These smaller arteries continue to get smaller in size as they get farther away from the heart and will become capillaries.

In the circulatory system, the smallest vessels are the capillaries. They are the vessels that bring oxygen and nutrients carried by the blood to tissues, providing cells with what they need. Capillaries also remove carbon dioxide and other waste from tissues and cells. From this point, capillaries connect to small veins to continue blood circulation.

Veins start small at the capillaries, but they become larger as they travel up the body and get closer to the heart. The process of blood circulation continues, bringing the blood supply back to the heart. Veins become small arteries, and the arteries meet at the vena cava on the right side of the heart. This large artery brings blood back into the heart through the right ventricle, and the process beings again.

Blood circulation plays an important role in the functions of the body. Oxygen and vital cells are transported through the blood. Red blood cells carry oxygen. White blood cells seek out pathogens and abnormal cells throughout the body that can cause problems. Without blood circulating through the body, all cells, tissues, and organs would die.

Through the process of blood circulation, information can be gathered about how the body is functioning. Doctors can use tests that detect blood flow to check for blockages in vessels. Blood pressure can be measured to determine if the heart is working properly. Samples of blood can be tested to check oxygen levels in red blood cells and diagnose many different types of conditions, from infection to cancers.

WiseGEEK is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By discographer — On Aug 20, 2013

I didn't know that veins are largest closest to the heart and get smaller and smaller towards the limbs. Is this why, when people are cold, their limbs turn blue first and start to freeze?

By ZipLine — On Aug 19, 2013

@literally45-- I'm not a doctor but I have family members with diabetes who also suffer from poor blood circulation. I think what happens is that when blood sugar is not under control, the sugar molecules damage blood vessels and also cause different types of buildup in them. And both of these lead to reduced blood flow and in turn, circulation problems.

This is why it's very important to keep your diabetes under control with medications, diet and exercise. If you keep your blood sugar levels within the normal range, you will reduce the chances of further circulation problems.

By literally45 — On Aug 19, 2013

I didn't realize how important blood circulation is until I was diagnosed with diabetes. Since then I've been experiencing circulation problems. What is the cause of poor blood circulation and why does it happen to diabetics?

WiseGEEK, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGEEK, in your inbox

Our latest articles, guides, and more, delivered daily.