Circulatory System Quiz

What is the main function of red blood cells in the circulatory system?

• Fighting infections

• Transporting gases like oxygen

• Helping blood clot

• Producing hormones

Which side of the heart pumps oxygenated blood?

• Right side

• Left side

• Both sides equally

• Neither side

What is the correct order of blood flow through the heart?

• Left atrium → left ventricle → right atrium → right ventricle

• Right atrium → right ventricle → lungs → left atrium → left ventricle

• Right ventricle → right atrium → left ventricle → left atrium

• Left ventricle → left atrium → right ventricle → right atrium

Which blood vessels typically carry oxygen-rich blood?

• Veins

• Arteries

• Capillaries

• Vena cava

What is the function of heart valves?

• To produce blood cells

• To filter out waste products

• To prevent backflow of blood

• To store extra blood

Which part of the blood is responsible for clotting?

• Plasma

• White blood cells

• Red blood cells

• Platelets

What happens in the lungs during circulation?

• Blood picks up carbon dioxide

• Blood picks up oxygen and releases carbon dioxide

• Blood releases oxygen

• Blood cells are produced

Which of these is NOT a component of blood?

• Plasma

• White blood cells

• Bone marrow

• Platelets

What is the purpose of coronary arteries?

• To remove waste from the heart

• To supply blood to the heart muscle

• To pump blood to the lungs

• To store extra blood for emergencies

What could be a potential problem caused by an atrial septal defect?

• Too much oxygen in the blood

• Mixing of oxygen-rich and oxygen-poor blood

• Increased production of red blood cells

• Slower heartbeat