Vessels that carry blood to the heart, operate under low pressure, and are relatively thin-walled are called:

The valve is located between the left atrium and the left ventricle is the:

The main coronary arteries are located on the surface of the:

The thick middle layer of the heart is called the:

The excess accumulation of fluid in the pericardial sac is called:

The _________ is a short trunk that serves to receive deoxygenated blood from the veins of the myocardium.

There are __________ main coronary arteries in the heart.

The valve located between the right atrium and the right ventricle is the:

The upper chambers of the heart are separated by the:

The lower chambers of the heart are called:

The valves that prevent backflow into the ventricles are called:

Oxygenated blood is distributed throughout the heart muscle through a process known as:

Which arteries carry unoxygenated blood?

Passive filling of the coronary arteries occurs during:

Concerning the pericardial sac, the part that is in direct contact with the pleura is termed:

The two main coronary arteries arise from the ________ of the aorta.

There are a total of ________ hollow chamber(s) in the heart.

The three layers of the arterial walls are called:

The two upper chambers of the heart are the:

The circumflex artery is a branch of the _________ coronary artery.

The area that surrounds the outside of the heart and divides the atria from the ventricles is called:

The left side of the heart is more muscular than the right side.