Sneezes: •caused by a sudden contraction of the muscles of respiration

• filters out particles like dust pollon and germs

Coughs: •offer humans a 2nd way to get rid of dust and germs

•simalar to sneezes  

flattening out and intercostal muscles are contrating and pulling the ribs upward and downward

•when it goes up your exhale

•when it goes down you inhale

Mucus Membrane: •lining in the nose

•covered in mucu

Hairs: •catches particles in the air when humans breath

•called this because no has to tell the system anything to breath.

•you don't have to think about it.

•firm and stiff and springy

•aka the larynx

•streching from to to bottom with two pairs of thick bands

•air is pushed up trough your lungs, passes through bands and makes sound

Carbon Dioxide: the waste your exhaling

Oxegen: a raw material your inhaling 

•oxegen enters when your inhaling

and co2 goes when your exhaling 

•at the end of the Bronchial Tree branches

•air sacks

•oxegen and CO2 exchange

•albveoli is at the beginning of it

•looks like an upside down tree

•tiny branches are the bronchioles

•connects to trachea

Windpipe

•goes to the lungs