17.2 Heart Anatomy and Blood Flow Pathway

Question 1

The heart wall has three layers:

Answer 1

The heart wall has three layers:

• the outer fibrous and serous pericardium,
• the middle myocardium,
• and the inner endocardium.

The serous pericardium is composed of

• the outer parietal pericardium and the inner visceral pericardium, between which is the serous fluid–containing pericardial cavity.

Question 2

The visceral pericardium is the same as the:

fibrous pericardium.

endocardium.

epicardium.

myocardium.

Answer 2

The visceral pericardium is the same as the:

fibrous pericardium.

endocardium.

epicardium.

myocardium.

Question 3

Which of the following vessels carries oxygenated blood?

pulmonary vein

superior vena cava

pulmonary trunk

pulmonary artery

Answer 3

Which of the following vessels carries oxygenated blood?

pulmonary vein

superior vena cava

pulmonary trunk

pulmonary artery

Question 4

What valve prevents the backflow of blood from the right ventricle into the right atrium?

pulmonary valve

right atrioventricular valve (tricuspid valve)

aortic valve

left atrioventricular valve (mitral or bicuspid valve)

Answer 4

What valve prevents the backflow of blood from the right ventricle into the right atrium?

pulmonary valve

right atrioventricular valve (tricuspid valve)

aortic valve

left atrioventricular valve (mitral or bicuspid valve)

Question 5

The two ventricles are separated by what?

The ____ ventricle has a thicker wall than the ____ because it pumps against higher pressure.

Answer 5

The two ventricles are separated by the interventricular septum.

The left ventricle has a thicker wall than the right because it pumps against higher pressure.

Question 6

Each atrium has an external auricle. The two atria are separated by what?

Answer 6

Each atrium has an external auricle. The two atria are separated by the interatrial septum.

Question 7

What are the four main great vessels?

Answer 7

The four main great vessels are the

1. venae cavae (superior and inferior),
2. the pulmonary trunk,
3. the pulmonary veins,
4. and the aorta.

Question 8

The coronary circulation consists of the coronary arteries, which supply the myocardium with oxygenated blood, and the coronary veins, which drain deoxygenated blood from the myocardium. The two main coronary arteries are the right coronary artery and the left coronary artery. The coronary sinus is the large vessel that receives blood from the coronary veins and empties it into the right atrium.

Answer 8

The coronary circulation consists of the coronary arteries, which supply the myocardium with oxygenated blood, and the coronary veins, which drain deoxygenated blood from the myocardium.

The two main coronary arteries are the right coronary artery and the left coronary artery.

The coronary sinus is the large vessel that receives blood from the coronary veins and empties it into the right atrium.

Question 9

The ____________ is the large vessel that receives blood from the ____________ and empties it into the ______atrium.

Answer 9

The coronary sinus is the large vessel that receives blood from the coronary veins and empties it into the right atrium.