Anatomy Exam Anatomy of the Heart 2

Question 1

Which layer of the heart wall is responsible for the actual pumping action?

Accepted Answer

Myocardium

Answer

The myocardium is the thick muscular middle layer of the heart wall that contracts to pump blood.

Question 2

What is the name of the depression on the interatrial septum that represents the remnant of the fetal foramen ovale?

Accepted Answer

Fossa ovalis

Answer

The fossa ovalis is an oval-shaped depression in the right atrium's interatrial septum, marking where the foramen ovale closed after birth.

Question 3

Which coronary artery supplies the SA node in most individuals?

Accepted Answer

Right coronary artery

Answer

The right coronary artery supplies the SA node in approximately 60% of individuals.

Question 4

The moderator band (septomarginal trabecula) carries which structure across the right ventricular cavity?

Accepted Answer

Part of the right bundle branch

Answer

The moderator band carries the right bundle branch of the cardiac conduction system from the interventricular septum to the anterior papillary muscle.

Question 5

Which surface of the heart rests on the diaphragm?

Accepted Answer

Inferior (diaphragmatic) surface

Answer

The inferior (diaphragmatic) surface of the heart, formed mainly by the left ventricle, rests on the diaphragm.

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Anatomy of the Heart 2