Biology Quiz - Human Circulatory System
1. The human circulatory system circulates:
A
blood
B
nerve cells
C
undigested food
2. The liquid part of blood is:
A
plasma
B
only water
C
haemoglobin
3. The blood cells that carry oxygen and carbon dioxide are:
A
white
B
red
C
colourless
4. Clotting is the function of:
A
white blood cells
B
platelets
C
red blood cells
5. A person with a low white blood cell count would have difficulty:
A
fighting disease
B
breathing
C
moving
6. The blood vessel with the thinnest wall is the:
A
vein
B
capillary
C
artery
7. The blood vessel with valves to allow one-way blood flow is the:
A
capillary
B
artery
C
vein
8. Arteries carry blood:
A
away from the heart
B
to the heart
C
in any direction
9. How many atria are in the human heart?
A
none
B
one
C
two
10. The heart chamber with the thickest muscular wall is the:
A
left ventricle
B
right ventricle
C
aorta
11. What is the name of the blood vessel that carries blood from the heart to the lungs?
A
aorta
B
pulmonary artery
C
renal artery
12. What is the name of the blood vessel that transports blood from the left ventricle to the rest of the body?
A
aorta
B
pulmonary artery
C
hepatic artery
13. The red pigment that carries oxygen or carbon dioxide in red blood cells is:
A
haemoglobin
B
medulla
C
systole
14. When a person has a heart attack, what artery is blocked?
A
pulmonary
B
renal
C
coronary
15. Heartbeat is controlled in the part of the brain called the:
A
cerebrum
B
brain stem
C
SA node
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