Heart Anatomy and Position Quiz

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What is the main function of the atria in the heart?

Pumping blood into the ventricles
Preventing overdilation of valve openings
Anchoring valve cusps
Receiving blood from the circulation (correct)

Where is the interventricular septum located?

Between the right and left atria
Between the myocardium and endocardium
Surrounding the atrio-ventricular, pulmonary, and aortic orifices
Between the right and left ventricles (correct)

What is the function of the fibrous skeleton in the heart?

Surrounds the atrio-ventricular, pulmonary, and aortic orifices
Exerts pumping force on the left ventricle
Prevents overdilation of valve openings (correct)
Receives blood from the circulation

Where is the epicardium located in the heart wall?

Visceral pericardium (D) Signup and view all the answers

Which part of the fibrous skeleton surrounds all four valves in the heart?

Fibrous rings around atrio-ventricular, pulmonary, and aortic orifices (B) Signup and view all the answers

What is the location of the heart within the pericardium?

Behind the body of sternum and costal cartilages (D) Signup and view all the answers

What are the external markings used to identify regions of the heart?

Apex and base (C) Signup and view all the answers

What is the function of left ventricle in comparison to the right ventricle?

Exerts more pumping force (D) Signup and view all the answers

What features distinguish the atria from ventricles in terms of their functions?

Function as receiving chambers for blood (A) Signup and view all the answers

What does the coronary sulcus separate in the heart?

Atria from ventricles (D) Signup and view all the answers

Which chamber of the heart receives deoxygenated blood from the inferior vena cava below and from the superior vena cava above?

Right atrium (C) Signup and view all the answers

What is the function of the ventricles in the heart?

Discharging chambers of the heart (D) Signup and view all the answers

Which valve guards the passage of blood from the left atrium to the left ventricle?

Mitral (bicuspid) valve (B) Signup and view all the answers

Which chamber of the heart has walls that are 3X thicker than those of the right ventricle?

Left ventricle (D) Signup and view all the answers

What is the smooth-walled outflow tract of the right ventricle called?

Infundibulum (B) Signup and view all the answers

What prevents backflow of blood into the atria when ventricles contract?

Atrioventricular valves (A) Signup and view all the answers

Which valve separates the right ventricle from the pulmonary arteries?

Pulmonary valve (C) Signup and view all the answers

Where are trabeculae carneae found in the heart?

In the walls of the left ventricle (C) Signup and view all the answers

Which valve separates the left ventricle from the aorta?

Aortic valve (C) Signup and view all the answers

Which chamber of the heart is responsible for receiving deoxygenated blood from the inferior vena cava and the superior vena cava?

Right atrium (B) Signup and view all the answers

What is the function of the right ventricle in the heart?

Discharges deoxygenated blood to the pulmonary trunk (D) Signup and view all the answers

What is the purpose of the mitral (bicuspid) valve in the heart?

Guards the passage of blood from the left atrium to the left ventricle (D) Signup and view all the answers

Where is the tricuspid valve located in the heart?

Between the right atrium and the right ventricle (C) Signup and view all the answers

What is the purpose of semilunar valves in the heart?

Prevent backflow of blood into the ventricles (C) Signup and view all the answers

What structures are attached to chordae tendineae in the heart?

Papillary muscles of the ventricle wall (D) Signup and view all the answers

Which part of the heart receives blood from four pulmonary veins that drain posteriorly?

Left atrium (B) Signup and view all the answers

What is the main function of the ventricles in the heart?

Discharge blood to pulmonary trunk and aorta (D) Signup and view all the answers

"Lub-dup" heart sounds are primarily due to which event in the heart?

Semilunar valves opening and closing (B) Signup and view all the answers