# bloodstream

/ˈbɫədˌstɹim/ (US) · /blˈʌdstɹiːm/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/bloodstream
Updated: 2026-05-08

## Definition

the flow of blood around your body. When you eat food or take medicine, the nutrients or chemicals eventually enter this system to reach your organs.

For teachers: the flow of blood as it circulates through the vascular system of a living organism. Often used to describe the transport of hormones, nutrients, or drugs to various tissues.

## Examples

- The medicine enters your bloodstream very quickly.
- After a meal, glucose levels in the bloodstream rise as the body begins to process carbohydrates.
- The kidneys act as a sophisticated filtration system, constantly removing waste products from the bloodstream while maintaining the delicate balance of electrolytes necessary for cellular function.

## Usage notes

- Usually used with the definite article 'the' in singular form when referring to the human circulatory system.

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