Understanding the Human Circulatory System

What do veins carry?

• Nutrients only

• Only oxygen

• Blood towards the heart

• Oxygenated blood away from the heart

What color represents deoxygenated blood vessels?

• Green

• Red

• Blue

• Yellow

Which chamber of the heart does the superior vena-cava flow into?

• Right atrium

• Left ventricle

• Right ventricle

• Left atrium

What does the superior vena-cava collect blood from?

• The heart

• The lungs

• The lower body

• The head, neck, and upper limbs

What is the purpose of the heart's valves?

• To oxygenate blood

• To produce red blood cells

• To prevent blood from flowing backwards

• To pump blood

Through which valve does blood exit the right atrium?

• Tricuspid valve

• Mitral valve

• Aortic valve

• Pulmonary valve

Why is the pulmonary artery unique?

• It carries deoxygenated blood away from the heart

• It connects to the left atrium

• It is the smallest artery

• It carries oxygenated blood

Where does gas exchange occur?

• In the heart

• In the veins

• In the arteries

• In the lungs

Which valve does blood pass through to enter the left ventricle?

• Aortic valve

• Tricuspid valve

• Pulmonary valve

• Mitral valve

Which valve is also known as the bicuspid valve?

• Aortic valve

• Tricuspid valve

• Pulmonary valve

• Mitral valve