TUTTEE ACADEMY LOGO
broken image
  • Home
  • About Us
  • Subjects 
    • CHEMISTRY
    • BIOLOGY
    • PHYSICS
    • MATHEMATICS
    • PSYCHOLOGY
    • ECONOMICS
    • BUSINESS
    • COMPUTER SCIENCE
    • CHINESE
    • ENGLISH
    • SPANISH
    • IBDP IA / EE
    • IBDP TOK
    • ONLINE TUTORIAL
  • Exam Boards 
    • IBDP
    • IBMYP
    • IGCSE & GCSE
    • HKDSE
    • GCE A-LEVELS
  • Courses 
    • IBDP Tuition
    • GCE A-Level Tuition
    • IBMYP Tuition
    • I/GCSE Tuition
    • HKDSE Tuition
  • Admission Test Prep 
    • PREDICTED GRADE
    • SAT / SSAT
    • UKISET (UK)
    • BMAT
    • UKCAT / UCAT
    • LNAT
    • TMUA (Cambridge)
  • Student Results 
    • IBDP STUDENT RESULTS
    • IGCSE & GCSE MATHEMATICS
    • A-LEVEL STUDENT RESULTS
    • IGCSE STUDENT RESULTS
    • GCSE STUDENT RESULTS (UK)
    • HKDSE STUDENT RESULTS
    • OUR STORIES
  • Question Bank
  • Resources
SCHEDULE A LESSON NOW

BIOL - How Our Immune System Fights Diseases 😷

Biology, immune system, vacciation - IGCSE | IBDP | DSE | GCE | IAL | AP Biology

· biology,immune system,vaccination

White blood cells are part of our body's immune system and help to defend our body against pathogens.

Let's look at how white blood cells fight diseases!

Phagocyte

  • Phagocytes are a type of white blood cells. Around 70% of white blood cells are phagocytes.
  • When pathogens such as bacteria enter our body, phagocytes engulf and digest the pathogen. This process is called phagocytosis.
  • Phagocytes can engulf and digest any type of pathogen, so it is non-specific.
broken image

Lymphocyte

  • Lymphocytes are another type of white blood cells. Around 25% of white blood cells are lymphocytes.
  • Lymphocytes produce proteins called antibodies, which play a very important role in the immune system.
    • Antibodies can recognize and bind to specific antigens. 
    • Antigens are substances found on the surface of cells, including pathogens.
    • When foreign antigens enter our body, specific antibodies will recognize them and bind to them. 
    • Antibodies can help neutralize and inactive foreign substances and pathogens.
    • It also becomes easier for phagocytes to spot and engulf pathogens when antibodies bind to antigens.
broken image

Sometimes, we get vaccinations to prevent ourselves from getting sick from certain diseases. Do you know how vaccination works? 😲

Vaccination

  • To make ourselves immune to certain diseases, we inject vaccines.
  • Vaccines contain inactivated pathogens. Since the pathogens are inactivated, they will not cause any serious symptoms even when they enter our body.
  • The pathogens, when they enter our body, will stimulate lymphocytes to produce antibodies that can specifically bind to the antigens on the cell surface of the pathogens.
  • Some of the lymphocytes will develop into memory cells.
  • If the same pathogen enters our body later, these memory cells will produce antibodies much faster and at a larger quantity so that the pathogen can be destroyed quickly.
broken image

Wanna Boost Up Your IGCSE Biology?

SIGN UP FOR A FREE TRIAL
Subscribe
Previous
BIOL - Genetic Modification of Bacteria and Plants
Next
BIOL - Carbon Cycle and Nitrogen Cycle
 Return to site
Profile picture
Cancel
Cookie Use
We use cookies to improve browsing experience, security, and data collection. By accepting, you agree to the use of cookies for advertising and analytics. You can change your cookie settings at any time. Learn More
Accept all
Settings
Decline All
Cookie Settings
Necessary Cookies
These cookies enable core functionality such as security, network management, and accessibility. These cookies can’t be switched off.
Analytics Cookies
These cookies help us better understand how visitors interact with our website and help us discover errors.
Preferences Cookies
These cookies allow the website to remember choices you've made to provide enhanced functionality and personalization.
Save