The lungs is the most known part of the respiratory system. The system is composed of a group of organs and tissues that work together to help us breathe and live each day. The oxygen your lungs takes in is very important in order for us to survive.

Got his information from: https://www.lung.org/lung-health-diseases/how-lungs-work#:~:text=Your%20lungs%20are%20part%20of,body%20while%20removing%20waste%20gases.
Here: The air we breathe contains oxygen and other gases. Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the bloodstream and then exhaled. Your lungs and the respiratory system automatically perform this vital process, called gas exchange.

What really is the trachea?
The trachea is most commonly known as the windpipe and is a key part of our respiratory system. the trachea is a long, U-shaped tube that connects your larynx or the voice box to your lungs.
What does it do?
Your trachea’s main function is to carry air in and out of your lungs. Because it’s a stiff, flexible tube, it provides a reliable pathway for oxygen to enter your body.

Smelling has been an important sense that we make use of every single day. We smell scents and even food before we eat them. All thanks to the olfactory mucosa for giving us these privileges. The olfactory mucosa is the part of the nasal mucosa that carries the specialized sensory organ for the modality of smell.