Three blood sample vials with red caps arranged on a neutral background, clinical laboratory concept showing diagnostic specimens ready for testing and analysis in a medical setting.

blood tube vial specimen sample medical laboratory clinical diagnostic healthcare test analysis hematology serum plasma collection container cap red closeup studio equipment clinic wellness pathology glass transparent liquid volume sterile microbiology biomaterial research experiment medicine prognosis patient urgent transport centrifuge label procedure coagulation venipuncture technician diagnostics vials analyte workflow