In the Body:
* Mucus: This sticky substance lines the respiratory and digestive tracts, trapping pathogens and preventing them from reaching sensitive tissues.
* Cilia: Tiny hair-like structures that line the respiratory tract, beat rhythmically to move mucus and trapped pathogens upwards, where they can be expelled by coughing or sneezing.
* Skin: The outer layer of skin acts as a barrier, preventing pathogens from entering the body.
* Lysozyme: An enzyme found in tears, saliva, and mucus that breaks down bacterial cell walls.
* Phagocytes: White blood cells that engulf and destroy pathogens.
* Lymphatic system: This network of vessels and tissues helps filter pathogens from the blood and lymph.
* Antibodies: Proteins produced by the immune system that bind to specific pathogens and mark them for destruction.
* Complement system: A group of proteins that work together to lyse (break open) bacterial cells and trigger inflammation.
Outside the Body:
* Masks: Physical barriers that trap respiratory droplets containing pathogens.
* Air filters: Filters in ventilation systems that trap airborne pathogens.
* Handwashing: Removing pathogens from hands by using soap and water.
* Disinfectants: Chemicals that kill pathogens on surfaces.
* Antiseptics: Chemicals that kill pathogens on living tissue.
* Boiling/Sterilization: Heat treatments that kill pathogens.
* Ultraviolet light: Kills pathogens by damaging their DNA.
Specific examples:
* Viruses: Can be trapped by mucus, cilia, and antibodies.
* Bacteria: Can be trapped by mucus, cilia, lysozyme, phagocytes, and antibiotics.
* Fungi: Can be trapped by phagocytes and antifungal medications.
* Parasites: Can be trapped by the immune system and antiparasitic medications.
It's important to note that trapping a pathogen doesn't necessarily mean it's destroyed. The immune system or other mechanisms are often needed to eliminate the trapped pathogen.
