bloodstream
noun
blood·stream
ˈbləd-ˌstrēm 
1
: the flowing blood in a circulatory system
2
: a mainstream of power or vitality
… introduce into the economic bloodstream a large amount of money …—
Harper's
Harper'sExamples of bloodstream in a Sentence
The drug is now entering the bloodstream.
Recent Examples on the Web
Seated calf raises can lower post-meal blood sugar spikes by gradually pulling glucose from the bloodstream.
—Mira Miller, Verywell Health, 26 Apr. 2026
Messer explains that exercise does this, in part, by improving how your muscles use fat for energy and by increasing enzymes that help clear fat particles from your bloodstream.
—Daryl Austin, USA Today, 25 Apr. 2026
Because vitamin D is a fat soluble vitamin, those with excess fat tend to have less of the vitamin available in the bloodstream for the body to readily use.
—Helen Carefoot, Flow Space, 24 Apr. 2026
Doctors say the fine particles from air pollution can penetrate the lungs and bloodstream, triggering inflammation and a variety of health problems, including lung and heart disease.
—Stephanie Stahl, CBS News, 23 Apr. 2026
See All Example Sentences for bloodstream
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Mira Miller, Verywell Health, 26 Apr. 2026
Messer explains that exercise does this, in part, by improving how your muscles use fat for energy and by increasing enzymes that help clear fat particles from your bloodstream.
—Daryl Austin, USA Today, 25 Apr. 2026
Because vitamin D is a fat soluble vitamin, those with excess fat tend to have less of the vitamin available in the bloodstream for the body to readily use.
—Helen Carefoot, Flow Space, 24 Apr. 2026
Doctors say the fine particles from air pollution can penetrate the lungs and bloodstream, triggering inflammation and a variety of health problems, including lung and heart disease.
—Stephanie Stahl, CBS News, 23 Apr. 2026
See All Example Sentences for bloodstream
Cite this Entry
“Bloodstream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bloodstream. Accessed 29 Apr. 2026.
Copy CitationKids Definition
bloodstream
noun
blood·stream
-ˌstrēm
: the flowing blood in a living thing with a circulatory system
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