Match the words to their definition

1
The Immune System
Match the words to their definition Third
line of defense Type of phagocyte which work
alongside T- lymphocytes Antibody simulate
the production of antibodies Leucocytes Fights
local infections Autoimmune Disease Recognises
and destroys infected cells Killer T
cells Immune system attacks his/her own
body Helper T cells receptor proteins that
attach to pathogens Memory B cells Ready to
attack a pathogen which infected
previously First line of defense Immune
System Second line of defense White blood
cells Macrophages Skin and Mucous membranes
2
Crossword

• Complete the task to earn 5 counters each.
• Down
• A cell released by immune system to fight
  infection (8 letters)
• 4. When a disease spreads rapidly throughout the
  world. (8 letters)
• 7. Where white blood cells are made in the body.
  (2 words, 4 letters and 6 letters)
• 8. Another name for white blood cells. (10
  letters)
• 9. The process were white blood cells eat
  infected cells. (12 letters)
•  
• Across
• Proteins on the surface of a bug that the body
  recognises as foreign. (8 letters)
• Discovered by Alexander Fleming (10 letters)
• A disease given in a mild dose to make you immune
  to that disease. (Mostly received in childhood)
  (7 letters)
• Helps defend the body against disease, cells in
  the blood (3 words, 5 5 5 letters)
• A common virus with many different strains (4
  letters)

3
Crossword
9
4
3
1
2
7
5
8
6
4
Could you catch it?
Athletes Foot  Circle the diseases that are
contagious Sinusitis   Lung Cancer   Heart
disease   Chicken Pox   Cold Sores
Virus   HIV   Arthritis   Measles  
Conjunctivitis   Asthma   Flu   Broken
Leg   Pneumonia   Cystic Fibrosis   Down
Syndrome   Glandular Fever
5
Types of Immunity
Task 5 Match the definitions to the words.
(Cut them out and match)   Natural acquired
active immunity
Artificial acquired active
immunity   Natural acquired passive immunity
Artificial
acquired passive immunity   Innate immunity
  Weakened germs given so the body can create
resistance to a certain disease. (e.g. Measles,
Mumps and Rubella vaccine)   When you become
immune by actually having the infection and the
body is able to recognise the same infection and
kill it without you experiencing any symptoms.
(e.g. chicken pox) When antibodies are passed
from mother to baby during pregnancy. (Not an
everlasting immunity)   Not a specific immunity,
such as the skin, tears, stomach acid.
Short-term immunization by and injection of
antibodies into the system, which will not give
lasting immunity (e.g. Tetanus)  
6
Superstitions
True or False?  

• To avoid the cold you shouldnt wear tight
  clothes or tight shoes.
• Coughing and sneezing was banned in public
  during the Plague.
•  Staying out in the cold without a coat causes
  pneumonia.
• A white moth in the house meant death long ago.
•  An onion cut in half and placed under the bed of
  a sick person will draw off fever and
  poisons.
• Maggots can be used to clean out wounds. The
  maggots only eat dead or infected tissues.
• Surgeons stole bodies from fresh graves in order
  to practice their surgery.
• If you go outside with wet hair youll catch a
  cold.

7

• True or False?
• Circle your answer
• Viruses cause many common illnesses. T/F
• Drugs such as antibiotics easily kill viruses.
  T/F
• Once you have contracted a specific virus, you
  will not get sick from that virus
  again because of the antibodies produced in your
  body. T/F
• Many diseases caused by viruses can be avoided
  through being vaccinated. T/F
• Viruses are very fragile and cannot live on
  surfaces outside the human body. T/F
• Viral illnesses cannot be transferred from
  animals to people. T/F
• The only way to transmit viruses is through
  close physical contact with an infected person.
  T/F
• Viruses can become resistant to drugs used to
  treat them. T/F

What Do You Know About Viruses?
8
Fighting Infection
First defence
Complete the flow chart about how the body fights
infection
Bacteria can get through the barriers and enter
the body through cuts scratches or in the food
we eat and the air we breathe.
Bacteria reproduce quickly, threaten cells and
can block vital organs.
Second defence
If the bacterial invasion can't be stopped, more
phagocytes from other parts of the body travel in
the blood vessels to help.
Third defence
B cells multiply into billions of cells, which
bind to the invader and destroy it. T Cells
identify and destroy any human cells which may
have died or changed or those which it recognises
as non-human.
Some B T cells produced live on after the first
attack and help the body fight against a second
attack should it occur. You are therefore immune
to these bacteria
9
Cut and Stick
Phagocytes are a group of white blood cells found
in bone marrow that can move and ingest invaders
until they themselves burst and die.
B cells are one kind of lymphocyte, (white blood
cells) covered with chemical feelers called
antibodies, which seek out and investigate
invaders.
Skin is waterproof and airtight it excretes oil,
which contains chemicals. Tears wash away micro
organisms, hairs in the nose filter air and
coughing and sneezing expel micro organisms.
Stomach digestive juices can kill some organisms
that enter through the mouth.