My stomach
I think you are referring to your tonsils, as you do not have lungs in your throat.
from nose through airway in throat into lungs
The respiratory system is what system your lungs are apart of, and your throat, if it's the same as the esophagus, is apart of the digestive system.
systemic
the trachea
Bronchus.....bronchial tube, wind pipe, etc.
Your throat (and tonsils if you still have them) are a 'safety net' - catching viruses and other bugs that would make their way into your lungs. The inflammation in a sore throat is simply the body's defences fighting the infection.
a waterfall
The trachea connects to the bronchi to connect to the lungs.
Lungs, heart and throat
The trachea.
Sputum