Answer:
A. Epicardium
B. Myocardium
C. Endocardium
D. Interventricular septum
E. Superior vena cava
F. Inferior vena cava
G. Right atrium
H. Tricuspid valve
I. Trabeculae carneae
J. Pulmonary semilunar valve
K. Pulmonary trunk
L. Left pulmonary veins
M. Left atrium
N. Mitral (bicuspid) valve
O. Left ventricle
P. Aortic semilunar valve
Step-by-step explanation: