Select your answer:
Topics:
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Cardiovascular System › ViewThis is the thickest layer of the heart
A. Pericardium
B. Endocardium
C. Myocardium
D. Epicardium
Human Circulatory System › View
What is the role of venules in the circulatory system?
A. Transporting oxygen to the body
B. Producing antibodies
C. Returning blood to the heart
D. Regulating body temperature