Which of the following mechanisms of the cardiovascular system helps regulate body temperature?

• Blood vessels in the skin constrict.

• Deoxygenated blood is delivered to the lungs.

• Lymphocytes produce antibodies.

• The heart receives oxygenated blood.

Match the structures of the cardiovascular system with their functions.

• receive blood returning to the heart

• atria

• 
  

  carry blood away from the heart

• arteries

• pump blood to the rest of the body

• veins

• control blood flow through the heart

• valves

• carry blood back to the heart

• ventricle

Which of the following is the type of blood vessel where the exchange of substances occurs between the blood and the tissues of the body?

• venule

• vein

• arteriole

• capillary

Which of the following valves is located between the left ventricle and the aorta?

• pulmonary valve

• mitral valve

• aortic valve

• tricuspid valve

Which of the following layers of the heart wall is made up of cardiac muscle fibers that contract to pump blood out of the heart?

• endocardium

• epicardium

• myocardium

• pericardium

Here is an image of the major blood vessels that enter and exit the heart. Use the following terms to label the blood vessels.

b

c

d

e

a

Pulmonary Veins

Inferior Vena Cava

Pulmonary Artery

Superior Vena Cava

Aorta

Identify the pathway of deoxygenated blood through the heart. Drag to correctly order the structures of the heart through which deoxygenated blood from the body tissues passes before the blood is transported to the lungs.

• tricuspid valve

• right atrium

• right ventricle > pulmonary valve

• pulmonary artery

• vena cava

Which of the following are structures of the heart involved in pulmonary circulation?

• right ventricle

• left atrium

• aorta

• pulmonary artery