Understanding the Human Heart

What are the four main chambers of the heart?

• right atrial, left ventricle, pulmonary artery, aorta

• right atrium, left atrium, inferior vena cava, superior vena cava

• right ventricle, left ventricle, coronary artery, pulmonary vein

• right atrium, right ventricle, left atrium, left ventricle

What is the primary function of the heart?

• To circulate oxygen in the lungs.

• To filter waste from the blood.

• To pump blood throughout the body.

• To digest food in the stomach.

Describe the pathway of blood circulation in the body.

• right atrium → left ventricle → body → lungs → right ventricle → aorta → vena cavae → left atrium

• left atrium → right atrium → body → lungs → left ventricle → aorta → right ventricle → vena cavae

• The pathway of blood circulation involves the heart, lungs, and body: right atrium → right ventricle → lungs → left atrium → left ventricle → aorta → body → vena cavae → right atrium.

• right ventricle → lungs → left atrium → aorta → body → right atrium → vena cavae → left ventricle

What role do the atria play in the heart?

• The atria pump blood directly to the lungs.

• The atria receive blood and pump it into the ventricles.

• The atria act as the main pumping chambers of the heart.

• The atria are responsible for oxygenating the blood.

What is the function of the left ventricle?

• To pump deoxygenated blood to the lungs.

• To regulate blood pressure in the arteries.

• To pump oxygenated blood to the body.

• To receive oxygenated blood from the body.

What is the purpose of heart valves?

• To increase heart rate during exercise.

• The purpose of heart valves is to regulate blood flow direction and prevent backflow in the heart.

• To supply oxygen to the heart muscle.

• To store blood for later use.

Explain how the heart pumps blood throughout the body.

• The heart pumps blood by expanding and contracting the lungs.

• The heart pumps blood only when at rest, not during activity.

• The heart pumps blood by filtering toxins from the blood.

• The heart pumps blood by contracting and relaxing, moving blood through the lungs and the rest of the body.

What is the significance of the pulmonary circulation?

• It transports nutrients to the heart.

• It regulates blood pressure in the systemic circulation.

• It removes waste products from the brain.

• It facilitates gas exchange, supplying oxygen to the blood and removing carbon dioxide.

How does the heart receive oxygenated blood?

• The heart receives oxygenated blood via the pulmonary veins.

• The heart receives oxygenated blood via the coronary arteries.

• The heart receives oxygenated blood through the vena cava.

• The heart receives oxygenated blood from the aorta.

What happens during a heartbeat?

• The heart only contracts without relaxing.

• The heart pumps air instead of blood.

• The heart stops beating during a heartbeat.

• The heart contracts and relaxes to pump blood throughout the body.