Blood leaves the inferior vena cava and flows directly into the __________.

During exercise, the cardiovascular system must supply muscles with large amounts of oxygen and fuel and get rid of a lot of wastes. How do the cardiovascular systems of athletes respond to prolonged exercise?Athletes are not the only people with enlarged hearts. Many patients with cardiovascular disease also have enlarged hearts. Suggest a cause of this enlargement.

Which chamber(s) of a human heart receive(s) and pump(s) oxygenated blood?

Heart valves function to __________.

What is the physiological cause of a heart attack?

Pressure is greatest in the ventricles when __________.

The SA node generates an electrical impulse from its location in __________.

A recording of the electrical activity of a patient's heart shows that the atria are contracting regularly and normally, but every few beats the ventricles fail to contract. Which of the following is probably functioning improperly?

Your blood pressure is 120/70. The "120" indicates __________, and the "70" indicates __________.