Name:___________________________
The Circulatory and Respiratory Systems
1. Which body system acts in a way similar to a transportation system?
a.
b.
c.
d.
circulatory
respiratory
nervous
excretory
2. Which of the following is NOT a part of the circulatory system?
a.
b.
c.
d.
heart
air passageway
blood vessels
blood
3. In the walls of the heart, the thick layer of muscle is called the
a.
b.
c.
d.
epithelial tissue layer.
pericardium.
connective tissue layer.
myocardium.
4. Which is the correct direction of blood flow?
a.
b.
c.
d.
right atrium  right ventricle  pulmonary artery
right atrium  left atrium  pulmonary artery
left ventricle  pulmonary artery  aorta
left ventricle  left atrium  aorta
5. Compared with the walls of arteries, the walls of veins
a.
b.
c.
d.
are thicker.
are thinner.
lack valves.
have more resistance.
6. Which of the following are the smallest of the blood vessels?
a.
b.
c.
d.
arteries
veins
lymphatic cells
capillaries
7. The function of valves in the human circulatory system is to
a.
b.
c.
d.
stimulate the heartbeat.
accelerate the flow of blood.
prevent the backward flow of blood.
serve as a cushion to prevent friction.
8. When the blood pressure is constantly too high, the condition is known as
a.
b.
c.
d.
a heart attack.
hypertension.
atherosclerosis.
a stroke.
9. Which of the following is NOT a function of blood?
a.
b.
c.
d.
regulate filtration
regulate body temperature
transport nutrients
fight infection
10. The process by which oxygen and carbon dioxide are exchanged between cells, the blood,
and air in the lungs is called
a.
systemic circulation.
b.
respiration.
c.
emphysema.
d.
cellular respiration.
11. Which of the following statements about lungs is INCORRECT?
a.
b.
c.
d.
They are muscular.
They are elastic.
They are surrounded by pleura.
They are above the diaphragm.
12. What structure serves as a passageway for both air and food?
a.
b.
c.
d.
pharynx
trachea
larynx
bronchus
13. Air is filtered, warmed, and moistened in the
a.
b.
c.
d.
nose and mouth.
throat.
lungs.
pharynx.
14. Air is forced into the lungs by the contraction of the
a.
b.
c.
d.
alveoli.
bronchioles.
diaphragm.
heart.
15. Generally speaking, what controls breathing?
a.
b.
c.
d.
the brain
the lungs
the diaphragm
the heart