Simple Definition of bloodstream

from our Learner's Dictionary

bloodstream

noun

ˈblʌdˌstriːm How to pronounce bloodstream (audio)
: the flow of blood that moves through the heart and body
The drug is now entering the bloodstream.

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“Bloodstream.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/bloodstream. Accessed 23 Jun. 2026.

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