Select your answer:

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Basics of Cardiology › ViewWhich heart valve is located between the left atrium and left ventricle?
A. Pulmonary valve
B. Tricuspid valve
C. Bicuspid (mitral) valve
D. Aortic valve
Biology › View
the backflow of blood stops in veins by …….
A. valves
B. muscles
C. heartbeats
D. lymphatic vessels