Heart Structure

What is the main function of the heart?

• To digest food

• To produce energy

• To control body temperature

• To pump blood

Answer explanation

The main function of the heart is to pump blood.

How many chambers are there in the human heart?

• 8

• 2

• 4

• 6

Answer explanation

There are 4 chambers in the human heart - 2 atria and 2 ventricles.

Name the upper chambers of the heart.

• Coronary arteries

• Pulmonary veins

• Atria

• Ventricles

Answer explanation

The upper chambers of the heart are called atria, which receive blood from the veins and pump it into the ventricles.

Which chamber of the heart receives oxygenated blood from the lungs?

• lower ventricle

• left atrium

• upper atrium

• right atrium

Answer explanation

The left atrium receives oxygenated blood from the lungs, making it the correct choice.

What is the name of the valve between the left atrium and left ventricle?

• Tricuspid valve

• Mitral valve

• Pulmonary valve

• Aortic valve

Answer explanation

The valve between the left atrium and left ventricle is called the Mitral valve.

What is the purpose of the heart valves?

• To store excess nutrients

• To ensure unidirectional blood flow through the heart chambers

• To produce hormones

• To regulate body temperature

Answer explanation

The purpose of the heart valves is to ensure unidirectional blood flow through the heart chambers.

What is the role of the septum in the heart?

• It stores excess blood in the heart

• It separates the left and right sides of the heart.

• It produces hormones for heart function

• It regulates blood flow in the heart

Answer explanation

The septum in the heart separates the left and right sides of the heart, ensuring that oxygen-rich blood does not mix with oxygen-poor blood.

Explain the pathway of blood through the heart.

• Blood is pumped through the pulmonary artery into the aorta for distribution throughout the body

• Blood enters the heart through the aorta into the right atrium

• Blood enters the heart through the superior and inferior vena cava into the right atrium, then passes through the tricuspid valve into the right ventricle. From there, it is pumped through the pulmonary valve into the pulmonary artery, reaching the lungs for oxygenation. Oxygenated blood returns to the heart through the pulmonary veins into the left atrium, passes through the mitral valve into the left ventricle, and is finally pumped out through the aortic valve into the aorta to be distributed throughout the body.

• Oxygenated blood returns to the heart through the inferior vena cava into the left atrium

Answer explanation

Blood enters the heart through the superior and inferior vena cava into the right atrium, then passes through the tricuspid valve into the right ventricle. From there, it is pumped through the pulmonary valve into the pulmonary artery, reaching the lungs for oxygenation. Oxygenated blood returns to the heart through the pulmonary veins into the left atrium, passes through the mitral valve into the left ventricle, and is finally pumped out through the aortic valve into the aorta to be distributed throughout the body.

What is the significance of the coronary arteries in heart function?

• Coronary arteries have no impact on heart function.

• Coronary arteries transport deoxygenated blood away from the heart.

• Coronary arteries are essential for delivering oxygenated blood to the heart muscle.

• Coronary arteries are responsible for regulating blood pressure in the heart.

Answer explanation

Coronary arteries are essential for delivering oxygenated blood to the heart muscle.

How does the heart maintain its own blood supply?

• The heart does not require its own blood supply

• Coronary arteries supply oxygen-rich blood to the heart muscle.

• The heart generates its own blood supply

• The heart receives blood from the lungs

Answer explanation

Coronary arteries supply oxygen-rich blood to the heart muscle, ensuring the heart's own blood supply.