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.
In animal trials, the devices successfully navigated through the circulatory system and reached target brain regions autonomously, delivering localized stimulation with micrometer precision. Neetika Walter, Interesting Engineering, 5 Nov. 2025 The circulatory system, made up of the heart, arteries, capillaries, and veins, moves blood throughout the body. Lucy Notarantonio, MSNBC Newsweek, 2 Nov. 2025 Their larvae would tunnel in, feeding underneath the bark, destroying the circulatory systems of trees. Frank Vaisvilas, jsonline.com, 29 Oct. 2025 The Galaxy Watch8 also measures your vascular load, or the amount of stress on your circulatory system, during sleep. Maggie Ryan, Flow Space, 21 Oct. 2025 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 9 Nov. 2025.

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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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