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Circulatory System

Total questions: 21

Worksheet time: 11mins

Name
Class
Date
1.

What is the main organ of the circulatory system?

a)

small intestine

b)

bone

c)

lungs

d)

heart

2.

How many types of blood vessels are in our body?

a)

1

b)

2

c)

3

d)

4

3.
The circulatory system works with the ___________ system to provide our body with oxygen.
a)
respiratory
b)
digestive
c)
muscular
d)
skeletal
4.

The heart has ___ chambers.

a)

1

b)

2

c)

3

d)

4

5.
The circulatory system works with the __________ system to obtain energy from nutrients that we eat. 
a)
respiratory 
b)
digestive
c)
skeletal
d)
nervous
6.

The job of the heart is to . . .

a)

pump blood around the body.

b)

send food to the small intestines.

c)

break down food.

d)

give energy to the body.

7.

Veins carry oxygen poor blood back to the heart.

a)

False

b)

True

8.
______________ are the smallest blood vessels.
a)
Arteries
b)
Veins
c)
Capillaries
9.
What does Deoxygenated mean?
a)
Oxygen-rich
b)
Blood flow
c)
Oxygen-poor
d)
Water Flow
10.
What function does the heart do?
a)
Protects organs and produces red blood cells.
b)
Generates heat.
c)
Breaks down food into nutrients.
d)
The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.
11.
What is the Circulatory System also known as?
a)
The heart
b)
Cardiovascular System
c)
Nervous System
d)
Aorta
12.
Carbon dioxide is considered a _________________
a)
food
b)
waste
c)
energy
d)
fun party favor
13.
Platelets 
a)
allow for gases to exchange
b)
give blood its color
c)
fight infection and disease
d)
help clot blood
14.

These cells, in the blood, carry oxygen and give the blood its color.

a)

white blood cells

b)

plasma

c)

platelets

d)

red blood cells

15.

The cells in the blood that help fight germs like bacteria and viruses

a)

red blood cells

b)

platelets

c)

white blood cells

16.

What is the circulatory system made up of?

a)

Lungs, blood, blood vessels

b)

Liver, kidneys, and stomach

c)

Heart, Blood Vessels, and Blood

17.
On and off switches to let blood in and out of the heart are known as
a)
ventricles
b)
valves
c)
buttons
d)
pulses
18.
The main function of the circulatory system is 
a)
To give the body structure and support
b)
Excrete waste
c)
transport blood, nutrients, and gases throughout the body
d)
to transport messages from the body to the brain
19.
The plasma that contains blood cells is mainly made up of 
a)
cytoplasm
b)
nutrients
c)
waste
d)
water
20.

You can feel your heart beating when you feel your _____________.

a)

pulse

b)

breathing

c)

stomach growling

21.

The type of blood vessel that normally carries oxygenated blood from the heart to the body cells?

a)

arteries

b)

capillaries

c)

veins

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