Left atrium and ventricle

This tutorial explores the anatomy of the heart, focusing on the left atrium and ventricle. It covers the pulmonary veins, mitral valve, chordae tendineae, left ventricle, aortic valve, papillary muscles, trabeculae carneae, pulmonary arteries, coronary sinus, aortic arch, and cardiac apex. The video explains the function and structure of these components, emphasizing their roles in blood circulation and heart function.

What is the primary function of the left atrium?

• To regulate heart rate

• To receive oxygenated blood from the pulmonary veins

• To pump deoxygenated blood to the lungs

• To separate the left and right ventricles

Which valve is located between the left atrium and left ventricle?

• Mitral valve

• Aortic valve

• Pulmonary valve

• Tricuspid valve

What is the role of the chordae tendineae?

• To separate the atria

• To connect the papillary muscles to the mitral valve

• To open the aortic valve

• To pump blood into the aorta

What is the function of the left atrial appendage?

• To store deoxygenated blood

• To act as a muscular pouch in the left atrium

• To regulate heart rhythm

• To connect the atria and ventricles

What happens when the pressure in the left ventricle exceeds that in the aorta?

• The pulmonary valve opens

• The tricuspid valve closes

• The mitral valve opens

• The aortic valve opens

What is the primary role of the papillary muscles?

• To pump blood into the atria

• To prevent inversion of the mitral valve

• To open the aortic valve

• To separate the ventricles

What is the function of the pulmonary trunk?

• To carry oxygenated blood to the body

• To carry deoxygenated blood to the lungs

• To separate the left and right atria

• To regulate heart rate

Which artery is longer and larger, the right or left pulmonary artery?

• Neither, they are veins

• Right pulmonary artery

• Left pulmonary artery

• Both are the same size

What is the role of the coronary sinus?

• To deliver oxygenated blood to the left atrium

• To collect deoxygenated blood from the heart muscle

• To regulate heart rhythm

• To pump blood into the aorta

Where is the cardiac apex located?

• At the top of the heart

• In the left atrium

• In the right atrium

• At the lowest superficial part of the heart