Answer: whitebloodcells

AnswerCrossword Clue
WHITEBLOODCELLSInfection fighters
WHITEBLOODCELLSImportant parts of the body's defense system
WHITEBLOODCELLSPart of the body's defense system
WHITEBLOODCELLSThey digest bacteria