Cardiovascular System

The aorta is an artery. This means that it carries blood...

• to the heart

• away from the heart

• past the heart

Blood enters the heart through the _________ and leaves through the _________.

• atrium, ventricle

• ventricle, atrium

• ventricle, aorta

• atrium, septum

_________ circulation moves blood from the heart to the lungs and back.

• Systemic

• Pulmonary

• Cyclic

Which blood vessels connect the heart and lungs?

• Pulmonary Artery

• Pulmonary Vein

• Aorta

• Superior vena cava

• Inferior vena cava

The _________ valve connects the right atrium and ventricle.

• Tricuspid

• Mitral

• Pulmonic

• Aortic

The ___________ empties into the heart from above (arms/head).

Which of these orders the heart's chambers correctly? (hint: which way does blood flow?)

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

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

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

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

• No order, blood flows randomly

Why do the pulmonary artery and vein each have two branches?

• One carries blood TO the heart, and one carries blood AWAY FROM the heart.

• The vessels are too large to curve properly, so they must branch to reach the lungs.

• There are two lungs, and each has one pulmonary artery and one vein connected to it.

• Redundancy; if one vessel breaks or becomes blocked, the other can do its job.

Why do we need two sets of blood vessels (arteries and veins)?

• Blood coming into cells must be oxygenated, and blood leaving cells must not be.

• Two-way blood vessels would not have enough capacity.

• The heart is complex and requires two sets of blood vessels to function.

• We don't.

When blood enters the heart from the pulmonary vein, it is...

• Oxygenated

• Not oxygenated