Download Circulatory System (Grades 5 to 7)

Name
Date
Circulatory System (Grades 5 to 7)
Complete.
antibodies
atria
heart
pulse
ventricles
antigens
blood
hemoglobin
red blood cells
white blood cells
aorta
blood vessels
plasma
valves
arteries
capillaries
platelets
veins
Matching
Match each definition with a word.
1.
These are the cells that contain hemoglobin and carry oxygen in the blood.
2.
These are the tiny blood vessels that connect arteries and veins.
3.
This is the red liquid that is carried by blood vessels throughout the body.
4.
These are the large blood vessels that carry blood away from the heart.
5.
These are the tiny blood cells that stop bleeding.
6.
This is what makes the blood red. It carries oxygen in the blood.
7.
These are flaps that stop blood from flowing the wrong way.
8.
This is the main and largest artery in the body. It carries blood, which has oxygen,
away from the left side of the heart to every part of the body, except for the lungs.
9.
These are the tubes which carry blood throughout the body.
10.
These are the lower chambers of the heart.
Multiple Choice
Select the definition that most nearly defines the given word.
11.
capillaries
A. These are the tiny blood vessels that connect arteries and veins.
B. This is the clear, liquid part of the blood that holds proteins, digested foods, wastes,
and other substances.
12.
ventricles
A. These are the lower chambers of the heart.
B. These are proteins that are made by white blood cells. They react to something
foreign in the body such as germs, bacteria, and viruses.
13.
antigens
A. This is the red liquid that is carried by blood vessels throughout the body.
B. A substance that causes the body to produce antibodies.
Name
Date
14.
red blood cells
A. These are the cells that contain hemoglobin and carry oxygen in the blood.
B. A substance that causes the body to produce antibodies.
15.
atria
A. These are the lower chambers of the heart.
B. These are the upper chambers of the heart.
16.
white blood cells
A. These are the cells which fight disease in the body.
B. This is what makes the blood red. It carries oxygen in the blood.
17.
veins
A. These are large blood vessels that carry blood to the heart.
B. These are the large blood vessels that carry blood away from the heart.
18.
antibodies
A. These are the tiny blood vessels that connect arteries and veins.
B. These are proteins that are made by white blood cells. They react to something
foreign in the body such as germs, bacteria, and viruses.
19.
arteries
A. These are the tiny blood cells that stop bleeding.
B. These are the large blood vessels that carry blood away from the heart.
20.
heart
A. This is the organ in your body, about the size of a fist, that pumps blood throughout
the body.
B. These are the upper chambers of the heart.
Review
21.
There are ________ white blood cells in your body than red blood cells.
A. More
B. Fewer
22.
What kind of blood vessel carries blood toward the heart?
A. Veins
B. Capillaries
C. Arteries
23.
A baby has a heart rate of around _____ seconds.
A. 72
B. 90
C. 45
D. 120
24.
What powerful muscle keeps the blood moving throughout the body?
A. Kidneys
B. Capillaries
C. Arteries
D. Heart
Name
Date
25.
The ________ are the lower chambers of the heart.
A. Atria
B. Ventricles
26.
Worrying too much can be hard on your body.
A. False
B. True
27.
When the ventricles squeeze, the flaps of the aortic valve close so blood can't flow back
into the atrium.
A. False
B. True
28.
The ____________ is a protective covering which keeps the heart from rubbing against
your lungs and chest wall.
A. Pericardium
B. Chamber
C. Valve
D. Septum
29.
If you avoid something, you stay away from it.
A. False
B. True
30.
Exercise and good diet may prevent heart attacks.
A. True
B. False
Name
Date
Circulatory System (Grades 5 to 7)
Pretend you are a doctor. Create a pamphlet with tips on how to keep your heart healthy.
Answer Key
1. red blood cells
2. capillaries
3. blood
4. arteries
5. platelets
6. hemoglobin
7. valves
8. aorta
9. blood vessels
10. ventricles
11. A
12. A
13. B
14. A
15. B
16. A
17. A
18. B
19. B
20. A
21. (B)
22. (A)
23. (D)
24. (D)
25. (B)
26. (B)
27. (A)
28. (A)
29. (B)
30. (A)