Circulatory System Quiz

What is the primary function of the circulatory system?

• To digest food

• To transport blood, oxygen, nutrients, hormones, and other substances throughout the body

• To produce energy for the cells

• To protect the body from infections

Which of the following is NOT a component of the circulatory system?

• Heart

• Blood vessels

• Kidneys

• Blood

Where is the heart located in the human body?

• In the abdominal cavity

• In the thoracic cavity between the lungs

• In the pelvic cavity

• Near the brainstem

What is the size of the average human heart?

• The size of a grapefruit

• The size of a person’s fist

• The size of a tennis ball

• The size of a football

The right atrium receives deoxygenated blood from which vessels?

• Pulmonary veins

• Superior and inferior vena cava

• Aorta

• Pulmonary arteries

What is the function of the left ventricle?

• To pump deoxygenated blood to the lungs

• To pump oxygenated blood to the body through the aorta

• To receive deoxygenated blood from the body

• To regulate blood pressure

Which heart chamber pumps oxygenated blood to the lungs for gas exchange?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the thick muscular layer of the heart called?

• Epicardium

• Endocardium

• Myocardium

• Pericardium

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

• Mitral valve

• Tricuspid valve

• Pulmonary valve

• Aortic valve

Blood flow through the heart is a one-way pathway. What ensures that blood flows in one direction?

• Arteries

• Veins

• Heart valves

• Heart contractions