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Name:__________________
Date:___________
Use the words in the box to fill in the blanks.
veins
transport
circulatory
arteries
oxygen
lungs
nutrients
energy
carbon dioxide
capillaries
dark
bright
away
heat
to
Period:_________
blood
heart
pumped
intestine
atmosphere
All animals need to ________________ materials around to the
different parts of their body. This is the job of the ________________
system. The circulatory system consists of a liquid called
_______________, a pump called the ________________ and a series
of vessels called _________________ and ________________.
One thing that must be transported around is a gas called
_____________. Oxygen enters the blood through the
______________. It is then ____________ through the heart and
around the body where it is used along with food to make
______________. The body produces another gas called
_______________, which is a waste product. This gas is carried back to
the heart and then to the lungs where it is released back into the
_______________.
The vessels that transport blood _________ from the heart are called
arteries. The blood in arteries is _____________ red because it is rich
in oxygen. The vessels that transport blood _______________ the heart
are called veins. The blood in veins is ______________ red because it is
low in oxygen. ________________ are small vessels that join the
arteries and veins.
_______________ from food are also transported around the body by
the circulatory system. They enter the blood from the small
_________________. The circulatory system also helps to regulate
temperature by transporting _________________ around the body.
Find the circulatory
system words
below in the grid to
the left.
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2
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3. The place where nutrients enter the blood.
1. The heart ___________ blood.
7. The pump in the circulatory system.
2. The heart, blood, and vessels.
8. A small vessel that connects veins and arteries.
4. Blood in arteries is ____________ red because it is
rich in oxygen.
10. The circulatory system ___________ nutrients,
gases, liquids, and heat around the body.
5. The largest artery in the body.
11. The circulatory system transports this, which
helps regulate temperature.
6. A waste gas that is transported in veins from the
body to the lungs via the heart.
12. The liquid in the circulatory system.
9. A vessel that moves blood away from the heart.
13. The place where oxygen enters the blood and
carbon dioxide leaves the blood.
14. A vessel that moves blood to the heart.
15. A gas that is transported in arteries from the lungs
to the rest of the body via the heart.
Name:________________
Date:____________
Use the words in the box to fill in the blanks.
air
oxygen
inhale
lungs
trachea
respiratory
carbon dioxide
yawn
bronchi
hiccup
diaphragm
water vapor
mouth
sneeze
blood
Period:______
exhale
cough
pharynx
nose
All animals need ________________ to make energy from food. We get
this oxygen from the _____________ that we breathe. In order to get
the oxygen into the blood where it can be transported to the rest of the
body, the air travels through a system of organs called the
_______________ system.
When you ________________, air enters the body through the
_______________ or the ____________. From there it passes through
the ______________, which forces air into the _______________ and
food into the esophagus. The air travels down the trachea into two
branching tubes called ________________ and then on into the
________________.
In the lungs oxygen from the air enters the _______________. At the
same time, the waste gas ____________________ leaves the blood and
then leaves the body when you ___________________. Some
__________________ also leaves the body when you exhale, which is
why mirrors get foggy when you breathe on them. The ______________
is the muscle that controls the lungs.
It is important to keep the respiratory system clear so oxygen can keep
flowing into your body. If something gets in your nose and irritates it, you
___________________. If something gets in your trachea or bronchi
and irritates it, you _________________. If something irritates your
diaphragm, you _________________. Finally, if the brain thinks you are
not getting enough oxygen, then it forces you to _________________.
Find the circulatory
system words below in
the grid to the left.
1
2
4
3
5
6
7
8
9
10
11
12
13
14
15
16
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19
Across
Down
2. One of two places where air enters your body.
1. This prevents food from going down your lungs.
4. When we exhale we breathe this plus carbon
dioxide.
3. All animals need this gas to make energy from
food.
7. You do this when something irritates your nose.
5. Scientific name for the windpipe.
8. You do this when you don't get enough oxygen to
your blood.
6. Inhale and exhale.
11. A gas that you breathe out. It is a waste gas.
14. The place where oxygen enters the blood.
16. You do this when something irritates your
diaphragm.
17. Breathe out.
19. Large muscle that controls the lungs.
9. Common name for the trachea.
10. Fish have these instead of lungs.
11. You do this when something irritates your trachea
or bronchi.
12. Two tubes that connect the trachea to the lungs.
13. Breathe in.
15. One of two places where air enters your body.
18. What we breathe.