noun which may take the genitive case particle 'no'
within the blood; blood-borne
Used as a no-adjective to describe something present or occurring inside the blood, such as substances, cells, or pathogens.
血液中の酸素濃度を測定する。
Measure the oxygen concentration in the blood.
血液中のウイルス量が減少した。
The amount of virus in the blood decreased.