bloodstream
/ˈblɪdˌstriːm/Definitions
1. noun
the flow of blood through the blood vessels, especially in the body as a whole.
“After the surgery, she was told to rest and allow her bloodstream to recover.”
2. noun
a particular type of blood, especially in a person’s body at a particular time.
“The doctor ordered a blood test to analyze the bloodstream of the patient.”