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Circulatory and Respiratory Systems

Total questions: 36

Worksheet time: 18mins

Name
Class
Date
1.

Which body system is shown here?

a)

circulatory system

b)

respiratory system

2.

Which body system is shown here?

a)

circulatory system

b)

respiratory system

3.

What is the main organ in the respiratory system?

a)

lungs

b)

heart

c)

vein

d)

artery

4.

What is the main organ in the circulatory system?

a)

lungs

b)

heart

c)

diaphragm

d)

bronchi

5.

Which cell part has a similar function to the circulatory system?

a)

mitochondria

b)

cytoplasm

c)

nucleus

d)

chloroplast

6.

You breathe in ___________ and breathe out ___________

a)

carbon dioxide, oxygen

b)

oxygen, carbon dioxide

7.

Arteries carry blood ____________________, veins carry blood _________________

a)

back to the heart, away from the heart

b)

away from the heart, back to the heart

c)

to outer space, back to Earth

d)

to the front office, to Ms. Lee's room

8.

What is the main function of the Respiratory System?

a)

blood transports nutrients and gases through the body

b)

exchanges gases between the body and the environment

c)

breaks down food to provide energy

d)

removes solid, liquid and gas waste from the body

9.

The trachea is also known as

a)

the lungs

b)

the windpipe

c)

the esophagus

d)

the bronchi

10.

What is the main function of the circulatory system?

a)

blood transports nutrients, gases and other substances throughout the body

b)

exchanges gas between the body and environment

c)

controls all the other body systems

d)

works with the skeletal system to help you move

11.

As your physical activity ____________, your heart rate ___________ and your breathing rate _______________

a)

decreases, increases, stays the same

b)

increases, increases, increases

c)

increases, decreases, increases

d)

decreases, stays the same, increases

12.

Which of these is NOT part of the circulatory system?

a)

capillary

b)

vein

c)

artery

d)

trachea

13.

What is the main function of blood?

a)

supports and protects your body

b)

it removes liquid waste from the body

c)

it sends signals to your brain

d)

it carries oxygen to all your body cells and returns carbon dioxide to the lungs

14.

Which of these is NOT part of the respiratory system?

a)

diaphragm

b)

lungs

c)

artery

d)

trachea

15.

How do the Circulatory and Respiratory Systems work together?

a)

you inhale oxygen, your blood delivers that oxygen to your cells and brings CO2 back to lungs to exhale

b)

your circulatory and respiratory systems don't work together

c)

the circulatory system helps your respiratory system digest food

16.
The job of the red blood cell is to
a)
fight infection
b)
deliver oxygen and discard carbon dioxide
c)
form scabs
17.
The four parts of the blood are
a)
plasma, platelets, red blood cells, white blood cells
b)
plasma, blue blood cells, white blood cells, red blood cells
c)
ventricle, atrium, vein, artery
18.
The air sacs in the lungs are called
a)
bronci
b)
lasagne
c)
alveoli
19.
The main branches that lead from the trachea to the lungs are called
a)
bronchioles
b)
bronchial tubes
c)
bronchi
20.
The heart has how many chambers (rooms)?
a)
four
b)
three
c)
two
21.
Capillaries connect veins to
a)
other capillaries
b)
veins
c)
arteries
22.
The right side of the heart sends blood to the 
a)
body
b)
lungs
23.
Your pulse tells how fast your ___________ is beating.
a)
heart
b)
lungs
24.
The left side of the heart sends blood out of the heart to 
a)
your lungs
b)
the rest of your body
25.
You have ____________lungs and _________heart(s),
a)
two, one
b)
two, two
c)
one, one
26.
The more physically active you are, the more your body needs
a)
carbon dioxide
b)
oxygen
c)
hydrogen
27.

Red blood cells hold onto O2 with the protein ________ which needs the element ________.

a)

hemoglobin, phosphorus

b)

hemoglobin, iron

c)

myoglobin, phosphorus

d)

myoglobin, iron

28.
This part of blood helps it clot, when you get cut.
a)
Red blood cells
b)
Plasma
c)
Platelets
d)
White blood cells
29.

_______ is/are made mostly of water and makes up about 55% of the blood

a)

Plasma

b)

Platelets

c)

Red blood cells

d)

White blood cells

30.
What does blood transport?
a)
Nutrients
b)
Oxygen 
c)
Carbon Dioxide
d)
All of the above
31.

The part of the respiratory system that humans use for talking is the...

a)

trachea

b)

alveoli

c)

larynx

d)

bronchi

32.

The small blood vessels where exchange of O2 and CO2 occurs are called...

a)

arteries

b)

capillaries

c)

veins

d)

heart

33.

The small tree-like branches coming off the right and left bronchus are the ________.

a)

Trachea

b)

Branches

c)

Bronchioles

d)

Pharynx

34.
This is an image of the alveoli in the lungs.
a)
True
b)
False
35.
The diaphragm is a dome-shaped muscle at the base of the rib cage.
a)
False
b)
True
36.
Which is the correct sequence of blood flow through the heart and lungs?
a)
left ventricle, left atrium, lungs, right ventricle, right atrium
b)
right atrium, right ventricle, lungs, left atrium left ventricle
c)
lungs, right atrium, right ventricle, left atrium, left ventricle
d)
right atrium, right ventricle, left atrium, left ventricle, lungs

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