The lungs and breathing are the main part of the respiratory system, which is used for breathing. Fresh air comes in through the mouth, down the trachea ( the windpipe), into the lungs through cartilaginous pathways called bronchi and bronchioles, where it is absorbed by tiny air sacs called alveoli. The lungs take in oxygen and get rid of carbon dioxide.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment