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 the Cardiorespiratory System?

Andrew Kirmayer
By
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 cardiorespiratory system is comprised of two separate sets of organs that rely on one another to function properly. It includes the heart as well as arteries, veins, and capillaries, which enable oxygen exchanged by the lungs to pass into the bloodstream to the cells. Respiratory organs include the lungs, diaphragm, bronchi, and mouth and nose, through which oxygen is directed toward air sacks and absorbed into the blood stream. The gas exchange between oxygen and carbon dioxide is a process a person cannot live without. Adequate exercise can increase the capacity of the lungs and the strength of the heart so more blood can be pumped, and more oxygen absorbed.

Air with oxygen passes into the cardiorespiratory system from the mouth and nose through the trachea, bronchi, and bronchiole tubes. Deep in the lungs are air sacks called alveoli where oxygen passes into the blood and carbon dioxide is removed from the bloodstream. A network of capillaries surrounds the thin cellular layer in the alveoli, and transport oxygen to the body via the pulmonary artery. One of the most important respiratory organs is the diaphragm, a muscle that helps moves the lungs in order in inhale and exhale air. Lungs are not muscular organs, so athletic exercise often focuses on the diaphragm to increase lung capacity.

The heart consists of four chambers which enable blood to enter, pass through the lungs, and exit to the rest of the body. Valves help move the blood in the right direction and, the stronger the heart is, the more blood it can push out each time it beats. For athletes, this means that the cardiorespiratory system can transport greater amounts of oxygen and nutrients to different areas of the body quicker. Training requires an understanding of how much oxygen can be breathed in during each minute. The measure is often made in comparison to an athletic person’s weight to determine an optimal exercise level.

Cardiorespiratory system function is also determined at the cellular level. When a person exercises frequently, it triggers the formation of mitochondria inside cells. Mitochondria make a substance called Adenosine Triphosphate (ATP) which is used by the body as energy. Enzymes also aid in the body’s ability to make efficient use of oxygen. In addition to exchanging respiratory gases, the cardiorespiratory system takes out lactic acid, urea, and other metabolic wastes, regulates the acidity of blood, and moves enzymes and hormones throughout the body.

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.
Andrew Kirmayer
By Andrew Kirmayer , Former Writer
Andrew Kirmayer, a freelance writer with his own online writing business, creates engaging content across various industries and disciplines. With a degree in Creative Writing, he is skilled at writing compelling articles, blogs, press releases, website content, web copy, and more, all with the goal of making the web a more informative and engaging place for all audiences.

Discussion Comments

Andrew Kirmayer

Andrew Kirmayer

Former Writer

Andrew Kirmayer, a freelance writer with his own online writing business, creates engaging content across various...
Learn more
WiseGeek, in your inbox

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

WiseGeek, in your inbox

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