Anatomy Exam Anatomy of the Heart 5

Question 1

Which structure marks the external boundary between the atria and ventricles on the surface of the heart?

Accepted Answer

Coronary sulcus (atrioventricular groove)

Answer

The coronary sulcus (atrioventricular groove) is the external groove encircling the heart that separates the atria from the ventricles.

Question 2

The apex of the heart is formed by which chamber, and where does it point?

Accepted Answer

Left ventricle; points inferiorly, anteriorly, and to the left

Answer

The apex of the heart is formed by the left ventricle and points inferiorly, anteriorly, and to the left, typically located at the 5th intercostal space in the midclavicular line.

Question 3

Which heart valve is best auscultated at the 5th left intercostal space, midclavicular line?

Accepted Answer

Mitral valve

Answer

The mitral valve (left AV valve) is best heard at the cardiac apex — 5th left intercostal space at the midclavicular line.

Question 4

The great cardiac vein runs in which sulcus?

Accepted Answer

Anterior interventricular sulcus

Answer

The great cardiac vein ascends in the anterior interventricular sulcus alongside the left anterior descending artery before continuing in the coronary sulcus.

Question 5

Which portion of the interventricular septum is primarily membranous (fibrous) rather than muscular?

Accepted Answer

The small superior portion near the fibrous skeleton

Answer

The membranous part of the interventricular septum is a small, thin fibrous area located superiorly near the fibrous skeleton; the remaining majority is thick muscular septum.

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Anatomy of the Heart 5