Defense Against! How Your Immune System Works
When invaders come to attack the body, the immune system steps up and battles to protect you! It is made up of a network of cells, tissues, and organs that work together to protect the body.
The villains are here! Germs! They come in many forms, viruses, bacteria, fungi, and parasites! But who will stand against them? Who will save you from illness?
The Immune System provides this kind of nonspecific protection we are looking for! Through a number of defense mechanisms, the body uses both nonspecific and specific defense mechanisms to detect and destroy pathogens, stopping most of the infection. Nonspecific defense doesn't target specific enemies.
Skin is known as the body's first line of defense against germs. The skin is always ready to fight against infection. If your skin becomes red and swollen, it means that your body is fighting off the disease.
Nose hairs also help to fight against diseases. The nose hairs trap and keep out dust and larger micoorganisms. If you sneeze, the dust will come out and will be gone from your nose hairs. the nose defends against airborne invaders and there may be a lot of germs living in your nose but they dont get very far into the body.
Mucus that is made up in your, throat and lungs traps bacteria, viruses, and dust.
When inflammation occurs, chemicals from the body's white blood cells are released into the blood or affected tissues to protect your body from foreign substances.
B-cells make antibodies, which circulate and bind to antigens.
Other types of t-cells recognize and kill virus-infected cells directly. Some help B-cells to make antibodies. A t-cell can kill cancer cells.
B-lymphocytes make special proteins called antibodies that recognize and kill certain germs. They also can mark germs to be destroyed by other cells. They also destroy cells infected by viruses.
Phagocytes are crucial in fighting infections, as well as maintaining healthy tissues by removing dead and dying cells that have reached their lifespan. During an infection, chemical signals attract phagocytes to places where the pathogen has invaded the body.
Ways to keep from being sick:
1. get a flu shot
2. wash your hands
3. Use alchohol based hand sanitizer
4. Avoid getting close to people who are sick
5. Keep your surroundings cleaned.