Respiration and
Excretion Test Review
7th grade Science
The ________________is a tubelike
passageway for both food and air.
Pharynx
People whose ____________ don’t work may
have to undergo dialysis.
kidneys
Organs that holds urine until it
leaves to body.
bladder
Cellular respiration requires
supplying your body’s cells with
________.
A.
B.
C.
D.
Oxygen
Blood
Bone Marrow
Enzymes
Structure to which vocal cords are
attached
Larynx
Cluster of thin-walled air sacs
Alveoli
Filtering units of the kidneys.
Nephrons
Disease resulting in the alveoli losing their ability
to expand and contract
emphysema
Major organs of urinary system
Kidney
Tubes that lead from each kidney
to the bladder
ureters
Branches of the trachea
bronchi
Muscle beneath lungs that helps
air move in and out
diaphragm
Tube with cartilage, mucous
membranes, and cilia
trachea
The _______ prevents food or
liquid from entering your trachea.
Epiglottis
When you breathe, your lungs take in oxygen and
remove ______________.
Carbon Dioxide
The main excretory organs of your
body are the large intestine, kidney,
lungs, and ________.
Skin
Your Respiratory System
Functions
I.
_________________
A. Supplies blood with oxygen
Remove Carbon Dioxide
B. _______________
C. Remove water from the body
Diseases and disorders
II.
_________________
A. Emphysema
B. Chronic bronchitis
C. Asthma
Lung Cancer
D. ________________
A disorder of the lungs called
_______ is often an allergic reaction.
Asthma
When urinary organs don’t work,
all of the following occur
EXCEPT _________.
A.
B.
C.
D.
Swelling
Homeostasis
Accumulation of wastes
Salt imbalance
Disorder
Chronic Bronchitis
Lung Cancer
Asthma
Emphysema
Description
Much mucus is produced;
coughing harms cilia and
bronchial tubes
Major cause is smoking;
leading type of cancer
deaths
Wheezing; bronchial tubes
contract quickly: often an
allergic reaction
Main cause is smoking;
alveoli in lungs lose their
ability to expand and
contract
____________ in cigarette smoke is the greatest
contributor to lung cancer.
Tar
The organs of your urinary system are _________
organs.
Excretory
The tube called the _________ leads from the
bladder to the outside of the body.
urethra
The amount of water in blood is important in
maintaining all of the following EXCEPT
_________________.
A.
B.
C.
D.
Healthy circulation
Normal Blood Pressure
The movement of gases
The movement of mucus
Breathing is partly the result of changing in air pressure.
high
Gases move from an area of ________
pressure to an area of
low
diaphragm contracts and
_________
pressure. When your __________
down
moves ___________,
you inhale. This causes the volume of
reduced
your chest cavity to increase, resulting in _________
air
pressure within your chest cavity. Your lungs fill with air. Air
outside the body, now under greater pressure, pushes into
your air passageways and lungs. The lungs expand as the air
rushes in.
When you exhale, your diaphragm relaxes and returns to its
dome shape. Your rib cage moves downwards. These two
reduce
actions __________
the size of your chest cavity. Your lungs
return to their original position. Air pressure in your lungs
increase
_____________.
The gases inside your lungs are pushed out
through air passages
List the 5 functions of the respiratory
system
1.
2.
3.
4.
5.
Cellular Respiration- supplies body cells with
oxygen to release energy from glucose.
Inhaling- bring oxygen into lungs
Air moves through nostrils- air is cleans as
dust. Air is trapped by hairs.
Air enters the nasal cavity- Air is moistened
and warmed
Exhaling- Removes carbon dioxide from the
lungs
List the three functions of the
urinary system
1.
2.
3.
It rids the body of waste
It helps control blood volume by removing
excess water produced by cells
It rids your body of excess salts
Describe why the skin and lungs are
classified as excretory organs

Skin releases perspiration containing water and
small amounts of salt. The lungs remove carbon
dioxide produced by cell activity in your body, as
well as small amounts of water each time you
exhale.
Explain how oxygen and carbon
dioxide are exchanged in the lungs

The exchange of oxygen and carbon dioxide
takes place between the alveoli and the
capillaries. Oxygen diffuses from the alveoli and
capillary walls into the blood. Oxygen is picked
up by the hemoglobin in red blood cells and is
carried to all body cells. As this happens, carbon
dioxide diffuses from body cells through
capillary and alveoli walls and leaves upon
exhaling.