The heart's skeleton is composed of fibrous connective tissue that acts as an electrical insulator between the atria and ventricles, preventing signals from the atria from directly activating the ventricles. This ensures that the contractile activity of the heart proceeds in a coordinated manner, with the atria contracting followed by the ventricles.

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The Heart's Skeleton

Question 22

Multiple Choice

The heart's skeleton

A) electrically insulates the ventricles from the atria.
B) is composed of calcified myocardium.
C) protects the heart from blunt force trauma.
D) protects the SA node.

Correct Answer: