Understanding Double Circulation

What are the main chambers of the heart?

• Right ventricle, left ventricle, pulmonary vein, aortic valve

• Right atrium, left atrium, right auricle, left auricle

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

• Aorta, pulmonary artery, vena cava, coronary artery

Describe the pathway of blood flow through the heart.

• Blood flows from the body to the right atrium, to the right ventricle, to the lungs, to the left atrium, to the left ventricle, and finally to the body.

• Blood moves from the right ventricle to the left atrium before reaching the body.

• Blood flows from the left atrium to the right ventricle directly.

• Blood circulates from the left ventricle to the body without going to the lungs.

What is the function of the left ventricle?

• To receive blood from the right atrium.

• To pump deoxygenated blood to the lungs.

• To pump oxygenated blood to the body.

• To regulate blood pressure in the arteries.

How does oxygenated blood return to the heart?

• Oxygenated blood is carried by the vena cava.

• Oxygenated blood returns through the aorta.

• Oxygenated blood flows through the coronary arteries.

• Oxygenated blood returns to the heart via the pulmonary veins.

What role do valves play in the circulatory system?

• Valves prevent backflow and ensure unidirectional blood flow in the circulatory system.

• Valves are responsible for oxygen exchange in the lungs.

• Valves store excess blood for later use.

• Valves increase blood pressure in the circulatory system.

Explain the difference between pulmonary and systemic circulation.

• Pulmonary circulation occurs only during exercise, while systemic circulation happens at rest.

• Pulmonary circulation carries oxygen-rich blood to the heart, while systemic circulation carries oxygen-poor blood to the lungs.

• Pulmonary circulation involves the movement of blood between the heart and lungs, while systemic circulation involves the movement of blood between the heart and the rest of the body.

• Systemic circulation is responsible for filtering blood in the kidneys, while pulmonary circulation delivers blood to the liver.

What is the significance of the aorta in the circulatory system?

• The aorta is responsible for regulating blood pressure.

• The aorta is a major vein that returns blood to the heart.

• The aorta is significant as it is the main conduit for oxygenated blood from the heart to the body.

• The aorta carries deoxygenated blood to the lungs.

How does the heart ensure unidirectional blood flow?

• The heart relies on muscle contractions alone.

• The heart pumps blood in both directions.

• The heart uses valves to ensure unidirectional blood flow.

• The heart uses arteries to control blood flow.

What are the main functions of the circulatory system?

• Regulate blood pressure only

• The main functions of the circulatory system are to transport blood, deliver oxygen and nutrients, remove waste products, and regulate body temperature.

• Store excess nutrients

• Produce hormones for digestion

How does the heart's structure support its function?

• The heart has only two chambers that pump blood in one direction.

• The heart relies solely on passive blood flow without muscular contractions.

• The heart's main function is to filter toxins from the blood.

• The heart's four chambers, muscular walls, valves, and electrical system work together to efficiently pump and circulate blood.