Understanding the Circulatory System

What is the primary function of red blood cells?

• Regulating body temperature

• Transporting gases

• Fighting infections

• Helping in digestion

Which component of blood is responsible for its red color?

• Plasma

• Platelets

• White blood cells

• Hemoglobin

What is the main role of the heart's valves?

• To prevent backflow of blood

• To pump blood

• To produce red blood cells

• To transport hormones

Which vessels typically carry oxygen-poor blood?

• Pulmonary veins

• Capillaries

• Veins

• Arteries

Where does the exchange of oxygen and carbon dioxide occur?

• Lungs

• Arteries

• Heart

• Capillaries

What is the function of platelets?

• Regulating pH

• Carrying oxygen

• Helping blood clot

• Transporting nutrients

Which heart chamber receives deoxygenated blood from the body?

• Left ventricle

• Right ventricle

• Left atrium

• Right atrium

What does the pulmonary artery do?

• Carries nutrients to the heart

• Carries oxygenated blood to the body

• Carries deoxygenated blood to the lungs

• Carries oxygenated blood to the heart

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

• Mitral valve

• Pulmonary valve

• Aortic valve

• Tricuspid valve

What is the major artery that carries oxygenated blood from the heart to the body?

• Inferior vena cava

• Superior vena cava

• Aorta

• Pulmonary artery