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Worksheets

Circulatory System

Total questions: 22

Worksheet time: 7mins

Name
Class
Date
1.

What is the main organ of the circulatory system?

a)

small intestine

b)

bone

c)

lungs

d)

heart

2.

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.

3.

The heart is about the size and shape of your . . .

a)

head

b)

fist

c)

hand

d)

foot

4.
The circulatory system works with the ___________ system to provide our body with oxygen.
a)
respiratory
b)
digestive
c)
muscular
d)
skeletal
5.

Arteries carry oxygen rich blood away from the heart.

a)

True

b)

False

6.

Veins carry oxygen poor blood back to the heart.

a)

False

b)

True

7.

Identify

a)

Left atrium

b)

Right atrium

c)

Left ventricle

d)

Right ventricle

8.

Identify

a)

Pulmonary veins

b)

Pulmonary artery

c)

Aorta

d)

Vena cava

9.

Identify

a)

Left atrium

b)

Right atrium

c)

Left ventricle

d)

Right ventricle

10.
The heart has ___ chambers.
a)
1
b)
2
c)
3
d)
4
11.
This chamber of the heart RECEIVES blood returning from the body
a)
Right Atrium
b)
Right Ventricle
c)
Left Atrium
d)
Left Ventricle
12.
Which chambers of the heart are the thickest and strongest?
a)
Atria
b)
Ventricles
c)
Valves
d)
Aorta
13.
What does Deoxygenated mean?
a)
Oxygen-rich
b)
Blood flow
c)
Oxygen-poor
d)
Water Flow
14.
A flap of tissue that prevents blood from flowing backward
a)
Aorta
b)
Atrium
c)
Septum
d)
Valve
15.
  Compared to arteries, veins 
a)
have a pleated endothelium.
b)
have thinner walls.
c)
have more smooth muscle in their tunica media. 
d)
hold their shape better when cut. 
16.

Carry blood away from heart; mostly oxygen-rich

a)

Arteries

b)

Veins

c)

Capillaries

17.
What is pulmonary circulation?
a)
Blood travelling to and from the lungs
b)
Blood travelling to and from the body
c)
A blood clot in the lungs
d)
The vessel that brings blood to the lungs
18.
Blood circulation from the heart to the rest of the body is called
a)
Full body
b)
Systemic
c)
pulmonary
d)
heart to lung
19.

Which is NOT a function of the circulatory system?

a)

deliver O2 and nutrients to cells

b)

remove CO2 and wastes from cells

c)

break down carbohydrates into glucose

d)

transport other materials through body

20.

The cells in the blood that help fight germs and illnesses are the...

a)

red blood cells

b)

platelets

c)

white blood cells

d)

axons

21.

Which best describes the relationship between the muscular system and the circulatory system?

a)

The circulatory system captures carbon dioxide from the air for muscle energy.

b)

The circulatory system produces red blood cells to bring oxygen to the muscles

c)

The circulatory system provides a framework for muscle movement

d)

The circulatory system delivers oxygen for muscle energy

22.
The liquid part of blood that makes up 55% of its composition?
a)
Plasma
b)
Platelets
c)
White blood cells
d)
Red blood cells