bloodstream

Hormones are secreted into the bloodstream.

Nutrients are absorbed into the bloodstream.

Bacteria was introduced into his bloodstream through an unsterile needle.

Red blood cells transport oxygen through the bloodstream.

Certain chemicals are easily absorbed into the bloodstream, while others are not.

Cryoglobulinemia is the presence of high amount of heavy globulins (eg IgM) in the bloodstream which thicken or gel on exposure to cold (=cryoglobulins).

Septicaemic plague occurs when infection spreads directly through the bloodstream, while the pneumonic form is the most virulent but least common.