- Structure Of The Human Gas-Exchange System -
Mammalian lung:
Lungs are site of gas exchange in mammals
They are in the body as the air is not dense to support and protect
Body as whole would otherwise lose a great deal of water and dry out.
Lungs are specialised for gas exchange:
When you breath in air this travels down the Trachea // windpipe.
↓
Bronchi/Bronchus is the split of the trachea at the end of the wind pipe.
↓
Bronchioles is the further branching of the bronchi into smaller tubes.
↓
Alveoli are at the end of the bronchioles which are 'air sacs'.
↓
The rib-cage, intercostal muscles and diaphragm all work together to move air in and out.
No comments:
Post a Comment