What is the meaning of the combining form "steth/o"? (one word)

What is the meaning of the combining form "thromb/o"? (one word)

What is the meaning of the combining form "phleb/o"? (one word)

Which layer of the heart is made of muscle tissue and pumps the blood through the system?

• Pericardium

• Myocardium

• Endocardium

How many chambers are in the heart?

• 2

• 3

• 4

• 6

What is the purpose of the valves in the heart?

• To prevent pathogens from entering the heart

• To control how fast the heart beats

• To keep the blood flowing in only one direction

• To separate the heart into two sides

Which of these types of blood vessels carry blood back to the heart?

• Veins

• Arteries

• Capillaries

• All of the above

During a heartbeat, what do the ventricles do while the atria relax?

• Contract

• Relax

• Vibrate

In what type of circulation does the blood flow between the heart and lungs?

• Pulmonary

• Systemic

• Coronary

• Atrioventricular

Which of these items fights disease and infection?

• Erythrocytes

• Leukocytes

• Thrombocytes

• Platelets