bloodstream
n. countablen. 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.
n. 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.
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.
From blood + stream.
Usually used with the definite article 'the' in singular form when referring to the human circulatory system.