Circulatory System Quiz Version A

Which of the following prevents back-flow of blood?

• ventricle
• valve
• SA node
• artery

The primary organ of the circulatory system is the ___?

• lungs
• skin
• heart
• brain

The function of the heart is to ____________?

• carry signals to the brain
• prevent infection
• eliminate waste from the body
• pump blood through your circulatory system

Capillaries are called _______ vessels because this is where oxygen and carbon dioxide are transferred into tissues.

• altering
• exchange
• performance
• export

Which of the following blood vessels has the thickest, strongest, most elastic walls?

• arteries
• capillaries
• veins
• venules

Which of these are NOT one of the 4 components of blood?

• Oxygen
• Plasma
• Platelets
• Red blood cells

Which chamber of the heart pumps oxygen-poor blood to the lungs, by going directly to the pulmonary arteries?

• Left atrium
• Left ventricle
• Right atrium
• Right ventricle

Which two gases are exchanged at the lungs?

• carbon dioxide & oxygen
• oxygen & nitrogen
• carbon monoxide & nitrogen
• carbon dioxide & carbon monoxide

Which type of blood is on the right side of the heart (left atrium & left ventricle)?

• oxygenated
• deoxygenated
• both

What type of muscle is the heart made of?

• smooth
• skeletal
• cardiac
• contracted