Circulatory System

The heart is best described as a 

• muscular pump
• storage chamber
• message center
• filtration unit

The heart is about the size of a/an

• egg
• apple
• pumkin
• peanut

What would happen if a small hole developed in the septum?

• the heart would stop pumping
• blood would move between R & L sides of heart
• the blood from pulmonary artery would enter aorta
• blood would not flow into coronary arteries

When blood leaves the left atrium, where does it go next?

• aorta
• left ventricle
• right atrium
• pulmonary artery

After blood leaves the right atrium, what valve prevents back flow?

• tricuspid
• mitral
• pulmonary
• aortic

What follows diastole?

• phagocytosis
• fibrillation
• hyperbole
• systole

What type of blood vessel is the MOST muscular and elastic?

• artery
• vein
• venule
• capillary

In what type of blood vessel does oxygen and carbon dioxide exchange take place?

• artery
• arteriole
• capillary
• vein

If a person becomes dehydrated, what would there be less of in the blood?

• erythrocytes
• platelets
• leukocytes
• plasma

If a person does not have enough erythrocytes, he would have difficulty:

• fighting infection
• carrying oxygen
• clotting the blood
• transporting antibodies