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.
Their larvae would tunnel in, feeding underneath the bark, destroying the circulatory systems of trees. Frank Vaisvilas, jsonline.com, 29 Oct. 2025 Unprecedented view inside organs The human circulatory system involves veins, arteries, vessels, and the lymphatic system. Mrigakshi Dixit, Interesting Engineering, 28 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 However, some data suggests magnesium influences several pathways in your body that are responsible for lowering circulating volume (the total amount of blood within the circulatory system). Laura Schober, Health, 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

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Cite this Entry

“Circulatory system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/circulatory%20system. Accessed 3 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

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