RESPIRATORY SYSTEM

                                                                         

 

 

 

 



 BREATHING WORKS IN TWO MODES:

 

 

- INSPIRATION: during inspiration, your diaphragm contracts and your chest cavity expands.

 

 

- EXPIRATION: during expiration your diaphragm relaxes and your chest cavity contracts.

 

 

HOW AIR TRAVELS AROUND BODY:

 

1.- Air enters the body througt the nostrills.

 

2.- The air travels down througt the larynx, the windpipe, the bronchi and the bronchioles, and finally reaches the lungs.

 

3.- Gas exchange takes places in the alveoli.