Heart and Great Vessels

Question 1

What is the heart?

Answer 1

A double self-adjusting muscular pump that works in unison to propel blood to the body

Question 2

What does the right side of the heart do?

Answer 2

Receives poorly oxygenated blood from the body through the superior vena cava and inferior vena cava and pumps it through the pulmonary trunk to the lungs for oxygenation.

Question 3

What does the left side of the heart do?

Answer 3

Receives well-oxygenated blood from the lungs through the pulmonary veins and pumps it into the aorta for distribution to body

Question 4

What are the three layers that the wall of the heart is composed of?

Answer 4

Epicardium
Myocardium
Endocardium

Question 5

What is the epicardium?

Answer 5

A thin external layer (mesothelium) formed by the visceral layer of serous pericardium

Question 6

What is the myocardium?

Answer 6

A thick middle layer composed of cardiac muscle

Question 7

What is the endocardium?

Answer 7

A thin internal layer (endothelium and subendothelial connective tissue) or lining membrane of the heart that also covers its valves.