circulatory system

noun

: the system of blood, blood vessels, lymphatics, and heart concerned with the circulation of the blood and lymph

Examples of circulatory system in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Focus on the Right Foods Directly influencing mood, sleep, and both the locomotor (musculoskeletal) and circulatory systems, as well as the body’s defense system, the effects of microbiota extend far beyond the intestines and their impact on digestion. Mélanie Nauche, Vogue, 28 May 2026 Ductwork inspection and modifications Your ductwork acts as the circulatory system for your home’s climate control. Nick Perry, USA Today, 28 May 2026 By Azeen Ghorayshi The detection of another circulatory system in the human body could have enormous scientific implications. Azeen Ghorayshi Azeen Ghorayshi Avraham Z. Cooper M.h. Miller Sam Anderson Lulu Garcia-Navarro Nitsuh Abebe Kwame Anthony Appiah John Hodgman, New York Times, 24 May 2026 In fact, the transfer of the egg contents to Colossal’s new device can take place before the circulatory system even forms. ArsTechnica, 20 May 2026 See All Example Sentences for circulatory system

Word History

First Known Use

1862, in the meaning defined above

Time Traveler
The first known use of circulatory system was in 1862

Browse Nearby Words

Cite this Entry

“Circulatory system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/circulatory%20system. Accessed 5 Jun. 2026.

Kids Definition

circulatory system

noun
: the bodily system of blood, vessels, and heart concerned with the circulation of the blood and lymph

Medical Definition

circulatory system

noun
: the system of blood, blood vessels, lymphatics, and heart concerned with the circulation of the blood and lymph

More from Merriam-Webster on circulatory system

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster