Select your answer:
Topics:
Pathogens Carbohydrates Asthma Musculoskeletal LE Musculoskeletal Infectious Diseases & the WHO Medical, Legal, and Ethical Issues Economic importance of Bacteria Body Movements Medical Terminology Prefixes Regulating the Cell Cycle Prehabilitation and Conditioning Pathogens - Bacteria and Viruses Body Structures and Organ Systems EntomologyOther quiz:
Human Circulatory System › ViewWhat are the blood cells?
A. Erythrocytes, leukocytes, and platelets.
B. The buffy coat and plasma proteins.
C. Blood cells, cell fragments, and plasma.
D. All compounds synthesized by the blood.
The Vascular System and Blood Flow › View
What is the main function of veins in the cardiovascular system?
A. Regulating blood distribution to the various tissues
B. Carrying oxygenated blood away from the heart
C. Exchanging gases and nutrients with the tissues
D. Returning blood to the heart for another trip throughout the vascular system