bloodstream

Từ điển Oxford Advanced Learner 8th

blood·stream [bloodstream bloodstreams] BrE [ˈblʌdstriːm] NAmE [ˈblʌdstriːm] noun singular
the blood flowing through the body
•They injected the drug directly into her bloodstream.

Example Bank:
•Red blood cells transport oxygen through the bloodstream.
•The drug is quickly absorbed into the bloodstream.
•Traces of banned substances were detected in his bloodstream.