Human Circulatory System Quiz

Which of the following is NOT a main part of the human circulatory system?

• Heart

• Blood vessels

• Lungs

• Blood

What is the role of oxygen in the circulatory system?

• To digest food

• To transport nutrients

• To provide energy to cells

• To produce hormones

What is the main role of the heart in the circulatory system?

• To digest food

• To pump blood

• To produce oxygen

• To store nutrients

What is the primary function of the heart?

• To digest food

• To pump blood around the body

• To filter waste

• To produce hormones

Where is blood squeezed into after the right atrium?

• Left atrium

• Left ventricle

• Right ventricle

• Aorta

What happens to the blood in the lungs?

• It is pumped to the left atrium.

• Oxygen replaces carbon dioxide.

• It is filtered for impurities.

• It is cooled down.

What type of blood enters the left atrium?

• Oxygen-poor blood

• Oxygen-rich blood

• Carbon dioxide-rich blood

• Deoxygenated blood

Which chamber of the heart pumps blood to the lungs?

• Left atrium

• Right atrium

• Right ventricle

• Left ventricle

What type of blood does the right ventricle pump?

• Oxygenated blood

• Deoxygenated blood

• Mixed blood

• Plasma

What is the role of the Atrioventricular node (AV Node)?

• It starts the heartbeat.

• It causes the atria to contract.

• It transmits signals to the ventricles.

• It regulates the heart rate.