Anatomy of the Heart

Where is the heart located in relation to the mediastinum?

• Between the first rib and the fourth intercostal space

• Between the second rib and the fifth intercostal space

• Between the third rib and the sixth intercostal space

• Between the fourth rib and the seventh intercostal space

What does the visceral layer (epicardium) cover?

• Internal surface of fibrous pericardium

• External surface of the heart

• Heart chambers

• Cardiac skeleton of valves

Which ventricle pumps blood into the aorta?

• Right ventricle

• Left ventricle

• Right atrium

• Left atrium

What is the function of the interventricular septum?

• Pumps blood into the pulmonary trunk

• Separates the ventricles

• Anchors the chordae tendineae

• Forms the anterior surface of the heart

Which ventricle is located on the postero-inferior surface of the heart?

• Right ventricle

• Left ventricle

• Right atrium

• Left atrium

What is the function of the interventricular septum?

• Pumps blood into the pulmonary trunk

• Separates the ventricles

• Anchors the chordae tendineae

• Forms the anterior surface of the heart

Which valve is also known as the left AV valve?

• Tricuspid valve

• Mitral valve

• Pulmonary valve

• Aortic valve

Which chamber of the heart pumps blood into the systemic arteries?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

Which part of the heart is responsible for the initial depolarization in the sequence of excitation?

• Atrioventricular (AV) node

• Purkinje fibers

• Sinoatrial (SA) node

• Left ventricle

What is the function of the Purkinje fibers?

• They initiate the heartbeat.

• They distribute the electrical impulse to the ventricles.

• They pump blood into the aorta.

• They regulate the heart rate.