Your body's ability to destroy pathogens that it has previously encountered is termed
Antibodies
Immunity
Vaccination
Inflammation

Antibodies.

When your body gets sick it has to fight off the bad guys. Once it spot off the bad guys it forms antibodies to those bad guys. The next time you get sick with the same thing you must likely have the antibodies to destroy pathogens.

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.