Layers of the heart wall flashcards

What are the three layers of the heart wall?

Epicardium, myocardium, and endocardium.

Function of the epicardium?

It serves as a protective outer layer of the heart.

True or false: Myocardium is the thickest layer.

True, because it contains cardiac muscle responsible for contractions.

Comparison: Epicardium vs. Endocardium

Epicardium is outer; endocardium lines the inner heart chambers.

Fill in the blank: The _____ is responsible for the heartbeat.

myocardium

What is the primary function of the myocardium?

It contracts and pumps blood throughout the heart.

Difference between myocardium and endocardium?

Myocardium is muscular; endocardium is a thin membrane lining chambers.

True or false: The endocardium is thicker than the myocardium.

False, because the endocardium is much thinner.

What does the epicardium contain?

Coronary vessels, nerves, and fat.

What layer facilitates heart electrical conduction?

Myocardium, due to its specialized cardiac muscle cells.

Fill in the blank: The _____ helps reduce friction during heartbeats.

epicardium

True or false: All layers of the heart have blood supply.

False, because only the myocardium has its own blood supply.

Function of the endocardium?

It provides a smooth lining for heart chambers and valves.

What layer is involved in forming the heart valves?

Endocardium, as it extends to form the valvular tissue.