The air we breathe goes through the (1) nasal passages, and then through the (2) trache or
windpipe, which separates into two branches, called (3) branchi
one entering lungs. The bronchi
subdivide many times inside the lungs, analogous to the branching pattern of grapes, finally becoming hair-
like tubes called (4)
In the last part of the terminal bronchioles are tiny bubble-like bunch of
When we inhale, our respiratory system receives (6)
gas. It will
and then into the (8)
side of our heart. It is then pumped by the heart into
structures called (5)
go into our (7)
our (9)
to release (11)
During that
gas is given off as waste materials. The blood delivers (13)
side of your heart, from which it is pumped to the lungs. It
Once it reaches the cells, oxygen processes the (10)
process, (12)
into the (14)
leaves our body through the lungs when you (15)​