Select your answer:
Topics:
Dentistry Source of Food Circulation of Blood Healthcare Systems and Settings Physical and Sensory Impairment Innate Immunity DNA Structure and Function Child Development Forensics: Blood Muscular Purpose and Function of the Skeletal System Branches of Microbiology Renal Pharmacology Skeleton and Muscles Cardiovascular System TerminologyOther quiz:
Microbiology › ViewWhich of the following is not a factor that weakens host defenses against infections?
A. Strong, healthy body
B. Chemotherapy
C. Physical and mental stress
D. Old Age
Life Processes › View
Large blood vessel that carries blood back to the heart.
A. Artery
B. Capillary
C. Vein
D. Aorta