The heart valves have a double layer of __________ with a layer of __________ in between.

The heart valves have a double layer of __________ with a layer of __________ in between.




a. epicardium, myocardium
b. epicardium, endocardium
c. myocardium, endocardium
d. endocardium, connective tissue
e. connective tissue, epicardium




Answer: D


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