Match each structure in the heart with its corresponding description or function.
-valve that prevents blood from backing up into the right atrium

A)right atrium
B)left atrium
C)right ventricle
D)left ventricle
E)aortic semilunar valve
F)pulmonary semilunar valve
G)tricuspid valve
H)mitral valve
I)aorta
J)pulmonary artery
K)pulmonary vein
L)superior vena cava